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[iOS 26.x] WKWebView crashes with NSInternalInconsistencyException — KVO inconsistency on configuration.enforcesChildRestrictions from STScreenTimeConfigurationObserver
Summary We are seeing a recurring fatal NSInternalInconsistencyException on iOS 26.x devices. The crash originates entirely from system frameworks (Foundation / WebKit / Screen Time / NSXPCConnection) — there are no app frames in the stack. The exception is raised from an XPC reply on a worker thread, so the host app cannot wrap it in @try/@catch. The crash appears to be a KVO consistency check failing inside the platform's internal Screen Time observer (STScreenTimeConfigurationObserver) when it observes WKWebView's configuration.enforcesChildRestrictions key path. The exception message states the value of the intermediate key configuration changed without an appropriate KVO notification. Environment iOS versions: 26.2.1 (also seen on 26.0.x – 26.2.x) Devices: iPhone 13 (iPhone14,5), iPhone 16 Plus, others App orientation: portrait Process state at crash: BACKGROUND (most occurrences) App uses WKWebView in several screens (link preview, in-app web, 3rd-party SDK web views) Crash is recurring across multiple users on iOS 26.x and is reproducible at scale in production Exception Name: NSInternalInconsistencyException Reason: Cannot update for observer <WKScreenTimeConfigurationObserver 0x...> for the key path "configuration.enforcesChildRestrictions" from <STScreenTimeConfigurationObserver 0x...>, most likely because the value for the key "configuration" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the STScreenTimeConfigurationObserver class. Crashing thread (top frames) 0 CoreFoundation __exceptionPreprocess 1 libobjc.A.dylib objc_exception_throw 2 Foundation -[NSKeyValueNestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] 3 Foundation NSKeyValueDidChange 4 Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] 5 Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] 6 Foundation NSSetObjectValueAndNotify 7 CoreFoundation invoking 8 Foundation -[NSInvocation invoke] 9 Foundation 10 Foundation -[NSXPCConnection _decodeAndInvokeReplyBlockWithEvent:sequence:replyInfo:] 11 Foundation __88-[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:]_block_invoke_5 12 libxpc.dylib _xpc_connection_reply_callout 13 libxpc.dylib _xpc_connection_call_reply_async 14 libdispatch.dylib _dispatch_mach_msg_async_reply_invoke 15 libdispatch.dylib _dispatch_root_queue_drain_deferred_item 16 libdispatch.dylib _dispatch_kevent_worker_thread (Every frame above frame 0 lives in the system. No app frames are present.) What we observed Crash fires asynchronously on a libdispatch kevent worker thread, triggered by an XPC reply from the Screen Time service. The exception is thrown while the platform updates a chained KVO key path (configuration.enforcesChildRestrictions) on a WKWebView instance. The intermediate key configuration apparently changed without a paired willChange/didChange notification, which Foundation's KVO machinery then flags as inconsistency. Because the throw happens on the XPC reply path, there is no app-level synchronous frame we can wrap to recover. The exception unwinds straight into std::__terminate. What we tried (no effect) Confirmed all WKWebView creation and release happens on the main thread. Stop loading and nil out navigationDelegate before releasing the WKWebView. Avoided mutating WKWebViewConfiguration after the WKWebView is created. Checked for any custom KVO on WKWebView.configuration in app code — none exists. The crash still reproduces; we have no path to mitigate it from the application side. Questions for Apple / the community Is STScreenTimeConfigurationObserver expected to observe WKWebView.configuration.enforcesChildRestrictions under all conditions on iOS 26, or only when Screen Time / Communication Limits / Child Restrictions are enabled on the device? 2. Is there a public API (WKWebViewConfiguration option, Info.plist key, etc.) to opt a WKWebView out of Screen Time observation for hosts that do not need Screen Time integration for their web content? 3. Is this a known regression in iOS 26.x KVO chained-key-path notification posting inside WebKit's Screen Time integration? If so, is a fix slated for an upcoming 26.x release? 4. Is there any recommended workaround on the application side that does not rely on swizzling private Foundation / NSXPCConnection methods? Reproduction notes We do not have a deterministic local repro. Crashes are heavily concentrated on: iOS 26.2.1 Devices with Screen Time / Communication Limits / Child Restrictions configured at the OS level App entering the BACKGROUND state shortly after a WKWebView session If anyone has a reliable local repro on a developer device, please share — we would also like to file a Feedback Assistant report with steps. Filed Feedback Will attach FB number once filed. Thanks in advance.
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iOS 26 beta 5 WKWebView crashes
WKWebView has set the option to disable selection ("document. documentElement. style. webkitUserSelect='none ';") and long press ("document. documentElement. style. webkitTouchCallout='none';"). If there is text on one of the images in WebView, simply tap the image twice and then long press the text. The program will crash with the following error message: 0 CoreFoundation 0x185e058c8 __exceptionPreprocess + 164 1 libobjc.A.dylib 0x182d797c4 objc_exception_throw + 88 2 CoreFoundation 0x185e908d4 -[NSException initWithCoder:] + 0 3 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2&lt;double&gt; const&amp;, bool) + 160 4 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 5 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 6 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 7 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 8 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 9 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 10 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 11 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 12 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 13 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 14 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 15 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 16 WebKit 0x1a05ae5d4 WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;::operator()(WebKit::DocumentEditingContext&amp;&amp;) + 64 17 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper&lt;WTF::CompletionHandler&lt;void (IPC::Connection*, IPC::Decoder*)&gt; IPC::Connection::makeAsyncReplyCompletionHandler&lt;Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;&gt;(WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;&amp;&amp;, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*&gt;::call(IPC::Connection*, IPC::Decoder*) + 196 18 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper&lt;WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef&lt;IPC::Encoder&gt;&amp;&amp;, WTF::OptionSet&lt;IPC::SendOption&gt;, std::__1::optional&lt;IPC::ConnectionAsyncReplyHandler&gt;, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*&gt;::call(IPC::Connection*, IPC::Decoder*) + 64 19 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef&lt;IPC::Decoder&gt;) + 340 20 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 Will the official version have this issue?
Topic: Safari & Web SubTopic: General Tags:
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305
Aug ’25
WKWebView customUserAgent replaces system User-Agent with NetworkingExtension identifier on iOS 26.4
Reproduction Steps:a. Create a WKWebView instance and set a custom string to customUserAgent.b. Load any web page (e.g., https://example.com).c. Check the User-Agent field in the request headers via packet capture tools or Web Inspector. Expected Result:The custom User-Agent should be appended to the default system identifier (Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15...), instead of being completely overwritten. Actual Result:The User-Agent is fully replaced with: NetworkingExtension/8624.1.16.10.6 Network/5812.102.3 iOS/26.4, and all basic system identifiers are missing. Additional Information: Device: iPhone 16 Pro Max iOS Version: 26.4 (Build 20T5127) WKWebView setup: Directly set using the customUserAgent property Network Extension features are not used in the project, but the NetworkingExtension identifier still appears in the User-Agent
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4w
Applications developed using WKWebView is limited to running at 60 fps.
I'm developing a cross-platform application using Tauri, which uses WebView technology as the GUI renderer. On macOS, it should be using WKWebView. Based on my tests, all applications developed with Tauri can only run at 60fps on macOS and cannot take advantage of ProMotion displays to achieve a 120fps refresh rate, whereas the same application can run at 120fps on other platforms. I have submitted this issue to Tauri on GitHub, and it appears that this cannot be resolved through external settings, but only by modifying the WKWebView code to support higher frame rates. Is there any possible solution to this?
Topic: Safari & Web SubTopic: General Tags:
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277
Aug ’25
Quic Protocol
Hi all, Managing Safari usage in an enterprise environment and I’m looking for ways to disable or restrict the QUIC protocol to enforce network-level security policies (e.g., content filtering). Does Safari offer any settings to disable QUIC, or is there a known workaround to prevent Safari from using it? Appreciate any insights or guidance.
Topic: Safari & Web SubTopic: General
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266
Jun ’25
WKWebView fails to render custom app fonts in macOS 26 beta 5
This post is an effort to draw attention to a regression in Tahoe that has a large impact on our app. This bug was filed during seed 3 but remains open: FB18869578: Regression: WebView fails to render fonts registered with CTFontManagerRegisterFontURLs or ATSApplicationFontsPath The gist of it is that WKWebView fails to render text that is styled with a “font-family” that references a font that has been loaded into the app using either the ATSApplicationFontsPath Info.plist key or loaded dynamically with CTFontManagerRegisterFontURLs. The area where the text should be is just blank. There is more detail and a reproducer in the bug referenced above. We really hope this bug can get fixed before GA. If anyone else would like to try and reproduce it, you can download a test case from here: https://e3supportuploads.s3-accelerate.amazonaws.com/8739959ce24de40fa462798a532aaa99fbfc9affba4f2a3e71d397f9e30d2604
Topic: Safari & Web SubTopic: General
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212
Aug ’25
guard let result = try? await evaluateJavaScript Crash
myCode is here // titleScript = "document.querySelector('#\(rawValue) span')?.textContent" guard let titleResult = try? await webView.evaluateJavaScript(type.titleScript), let title = titleResult as? String else { return } this code has error Thread 1: Swift runtime failure: Unexpectedly found nil while implicitly unwrapping an Optional value but edit Code like this It is works Successful do { ... let titleResult = try await webView.evaluateJavaScript(type.titleScript) let title = titleResult as? String ... } catch { LogManager.log(level: .error, self, #function, error, "title is Invalid : \(type.titleScript)") continue } I don't know why guard let _ = try? is Fail
Topic: Safari & Web SubTopic: General Tags:
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174
May ’25
Opening certain websites is making my entire browser freeze (no matter what browser I use)
Currently, im on MacOS Tahoe 26 Public Beta 2, build number 25A5327h. I just recently updated to this, and now, whenever I open some sites like Amazon, or ChatGPT, it freezes my entire browser and I have to force quit it. I tried deleting the SpeakSelection.plist file which everyone swore worked, but not for me. Is this because the new update messed with resource allocation or did my user data corrupt mid-update and i have to transfer all my stuff to a new user?
Topic: Safari & Web SubTopic: General
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Aug ’25
As of macOS 26.4, WKWebView content disappears after 3 seconds when part of a legacy ScreenSaver view hierarchy.
The title says it all, and I've filed FB FB22353950 that includes an Xcode 26.4 Screen Saver test project, QT movie demonstrating the error, and a PDF with complete steps to build and test. I'm asking here just to learn if this sounds familiar. The SS built on 26.4 fails in 26.4, works fine on 26.3.1. I'll supply the test files if there's interest. Thanks.
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Mar ’26
Is my POST method correct
//Is my post method correct because google and claude are telling me I must use content type for the json and use .setvalue. I thought that my process was correct because I encode the data to turn into json and then make the request func createTask(_ task: Task) async throws -> Task { if let url = URL(string: "(baseURL)/todos"){ var request = URLRequest(url: url) request.httpMethod = "POST" let encoder = JSONEncoder() do{ let data = try encoder.encode(task) request.httpBody = data let (data, response) = try await URLSession.shared.data(for: request) return task //we want to make encoder and then turn the data into json and put it in body } catch{ throw JSONErrors.encodingFailed } } else{ throw URLError(.badURL) } }
Topic: Safari & Web SubTopic: General Tags:
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149
Aug ’25
Epic games website sign in page
Hello i would like to report a bug on iOS 26 beta. The problem is on the epic games website you see when I hit sign in it is just blank but the epic games store is just fine i would like this to be fixed on iOS 26 beta 3 thank you.
Topic: Safari & Web SubTopic: General
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289
Jun ’25
CSS Grid subpixel column width misalignment at non-100% zoom levels in Safari
Steps to reproduce: Create a CSS grid with fractional column widths e.g. grid-template-columns: repeat(3, 518.7875px) Set browser zoom to 85% or 115% Observe columns misalign with background-size pattern Expected: Columns render consistently at all zoom levels Actual: Subpixel rounding causes visual misalignment macOS: 13/14/15 inch MacBook
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303
Feb ’26
app-site-association.cdn-apple.com | Cache not updating
We're handling our universal links (deep links) via our custom router written in express.js. We recently update our .well-known format as per: https://developer.apple.com/documentation/xcode/supporting-associated-domains Our own domain link shows them correctly if we apply cache bust to it: Normal link: https://links.sastaticket.pk/.well-known/apple-app-site-association Cache bust: https://links.sastaticket.pk/.well-known/apple-app-site-association?1 Now, since app-site cache is not updating at: https://app-site-association.cdn-apple.com/a/v1/links.sastaticket.pk Our main domain link is not getting updated response either. Its been more than 72 hours now. Any help, how to push the app-site cache to update? I can provide more context if needed, Thanks
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257
Mar ’26
On iOS 18.0, when setting a cookie with SameSite=None; Secure, the attribute does not take effect and is automatically converted to SameSite=Lax.
On iPhone 16 running iOS 18.0(Xcode 16.2), cookies configured with SameSite=None; Secure fail to apply correctly—iOS forcibly converts the attribute to SameSite=Lax. As a result, cross-site requests from H5 pages within our app cannot carry the required cookies, causing failures. Can anyone help me on this? Thanks in advance.
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257
May ’25
Apple Script to Automate Web Page Plot Data
Can someone please help me: I do not have the brain space (85yo) to figure out an Apple Script or Java Script app to do this simple task. I have spent a few hours each day, over several days, and have made zero progress on such an apparently simple task. I wish to create an Automator App for the macOS Safari browser that will schedule (via a Calendar Event) the download of the 48hr data behind the hourly Fuel Mix Plot Data from the AEMO Web Site, every Monday, Wednesday, Friday and Sunday. Here is the link to the AEMO web site: AEMO, Energy Systems, Electricity, National Electricity Market (NEM), Data (NEM),Data Dashboard https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem The 48 hour hourly Fuel Mix data is found by selecting the "Fuel Mix" button (which by default will display the NEM Current Trend). The 48 hour trend is displayed by tapping on the small "Current" pulldown menu, and selecting "48 hrs". The 48hr Data is down loaded by selecting the small circular button just to the right of the pulldown menu. a) AEMO Web Site: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem b) Main Menu, and underlying html, c) Fuel Mix menu, Pulldown list, DownLoad button, and underlying html, I am familiar with C++ and have built Xcode Apps, and used Excel Macros extensively in the past. Thank you. Robert.
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Jun ’25
Using multiple apple-developer-merchantid-domain-association files to support Apple Pay through different payment gateways
I'm in the process of supporting Apple Pay through a 2nd payment gateway for some users, so I need to support two separate Apple Pay relationships. Both require their own apple-developer-merchantid-domain-association. I don't see how I can have both files for the one domain. Is this possible? Is there a workaround other than just replacing the old file with the new one and hoping that doesn't disrupt anything. That seems to be the approach taken by others (https://developer.apple.com/forums/thread/695538) but it is too high risk for me without any confirmation from Apple that this is ok. I'd also like to avoid having to setup a 2nd domain for these customers, since the current domain is already quite embedded in their operations.
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1.1k
Feb ’26
WKWebView requires authentication
I use WKWebView to display a webpage that requires authentication through an authentication provider. This works as expected, but when I close and reopen the app, I have to reauthenticate. However, if I open the same page in Safari, I only have to authenticate once. If I close Safari and reopen it, the page displays without prompting me to authenticate again. I see some cookies stored in httpCookieStore, so I assume that storing cookies works. Does anyone have an idea why authentication is not persistent between app launches? Thanks in advance. Best regards, Marc
Topic: Safari & Web SubTopic: General Tags:
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Jul ’25
iOS Safari doesn't produce website's sound
Hi! Is there any fix: Sounds are not recreated while using websites with, for example, virtual piano keyboard or metronome.
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1
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0
Views
158
Activity
Jun ’25
OS26 SwiftUI WebView - Go Forward/Back?
Trying to implement my own forward/back buttons for the new SwiftUI WebView and reading the documentation I’m totally lost. What’s the recommended way of implementing forward/back behavior with this component?
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4
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0
Views
575
Activity
Aug ’25
[iOS 26.x] WKWebView crashes with NSInternalInconsistencyException — KVO inconsistency on configuration.enforcesChildRestrictions from STScreenTimeConfigurationObserver
Summary We are seeing a recurring fatal NSInternalInconsistencyException on iOS 26.x devices. The crash originates entirely from system frameworks (Foundation / WebKit / Screen Time / NSXPCConnection) — there are no app frames in the stack. The exception is raised from an XPC reply on a worker thread, so the host app cannot wrap it in @try/@catch. The crash appears to be a KVO consistency check failing inside the platform's internal Screen Time observer (STScreenTimeConfigurationObserver) when it observes WKWebView's configuration.enforcesChildRestrictions key path. The exception message states the value of the intermediate key configuration changed without an appropriate KVO notification. Environment iOS versions: 26.2.1 (also seen on 26.0.x – 26.2.x) Devices: iPhone 13 (iPhone14,5), iPhone 16 Plus, others App orientation: portrait Process state at crash: BACKGROUND (most occurrences) App uses WKWebView in several screens (link preview, in-app web, 3rd-party SDK web views) Crash is recurring across multiple users on iOS 26.x and is reproducible at scale in production Exception Name: NSInternalInconsistencyException Reason: Cannot update for observer <WKScreenTimeConfigurationObserver 0x...> for the key path "configuration.enforcesChildRestrictions" from <STScreenTimeConfigurationObserver 0x...>, most likely because the value for the key "configuration" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the STScreenTimeConfigurationObserver class. Crashing thread (top frames) 0 CoreFoundation __exceptionPreprocess 1 libobjc.A.dylib objc_exception_throw 2 Foundation -[NSKeyValueNestedProperty object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] 3 Foundation NSKeyValueDidChange 4 Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] 5 Foundation -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] 6 Foundation NSSetObjectValueAndNotify 7 CoreFoundation invoking 8 Foundation -[NSInvocation invoke] 9 Foundation 10 Foundation -[NSXPCConnection _decodeAndInvokeReplyBlockWithEvent:sequence:replyInfo:] 11 Foundation __88-[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:]_block_invoke_5 12 libxpc.dylib _xpc_connection_reply_callout 13 libxpc.dylib _xpc_connection_call_reply_async 14 libdispatch.dylib _dispatch_mach_msg_async_reply_invoke 15 libdispatch.dylib _dispatch_root_queue_drain_deferred_item 16 libdispatch.dylib _dispatch_kevent_worker_thread (Every frame above frame 0 lives in the system. No app frames are present.) What we observed Crash fires asynchronously on a libdispatch kevent worker thread, triggered by an XPC reply from the Screen Time service. The exception is thrown while the platform updates a chained KVO key path (configuration.enforcesChildRestrictions) on a WKWebView instance. The intermediate key configuration apparently changed without a paired willChange/didChange notification, which Foundation's KVO machinery then flags as inconsistency. Because the throw happens on the XPC reply path, there is no app-level synchronous frame we can wrap to recover. The exception unwinds straight into std::__terminate. What we tried (no effect) Confirmed all WKWebView creation and release happens on the main thread. Stop loading and nil out navigationDelegate before releasing the WKWebView. Avoided mutating WKWebViewConfiguration after the WKWebView is created. Checked for any custom KVO on WKWebView.configuration in app code — none exists. The crash still reproduces; we have no path to mitigate it from the application side. Questions for Apple / the community Is STScreenTimeConfigurationObserver expected to observe WKWebView.configuration.enforcesChildRestrictions under all conditions on iOS 26, or only when Screen Time / Communication Limits / Child Restrictions are enabled on the device? 2. Is there a public API (WKWebViewConfiguration option, Info.plist key, etc.) to opt a WKWebView out of Screen Time observation for hosts that do not need Screen Time integration for their web content? 3. Is this a known regression in iOS 26.x KVO chained-key-path notification posting inside WebKit's Screen Time integration? If so, is a fix slated for an upcoming 26.x release? 4. Is there any recommended workaround on the application side that does not rely on swizzling private Foundation / NSXPCConnection methods? Reproduction notes We do not have a deterministic local repro. Crashes are heavily concentrated on: iOS 26.2.1 Devices with Screen Time / Communication Limits / Child Restrictions configured at the OS level App entering the BACKGROUND state shortly after a WKWebView session If anyone has a reliable local repro on a developer device, please share — we would also like to file a Feedback Assistant report with steps. Filed Feedback Will attach FB number once filed. Thanks in advance.
Replies
1
Boosts
0
Views
531
Activity
3d
iOS 26 beta 5 WKWebView crashes
WKWebView has set the option to disable selection ("document. documentElement. style. webkitUserSelect='none ';") and long press ("document. documentElement. style. webkitTouchCallout='none';"). If there is text on one of the images in WebView, simply tap the image twice and then long press the text. The program will crash with the following error message: 0 CoreFoundation 0x185e058c8 __exceptionPreprocess + 164 1 libobjc.A.dylib 0x182d797c4 objc_exception_throw + 88 2 CoreFoundation 0x185e908d4 -[NSException initWithCoder:] + 0 3 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2&lt;double&gt; const&amp;, bool) + 160 4 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 5 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 6 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 7 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 8 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 9 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 10 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 11 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 12 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 13 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 14 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 15 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 16 WebKit 0x1a05ae5d4 WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;::operator()(WebKit::DocumentEditingContext&amp;&amp;) + 64 17 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper&lt;WTF::CompletionHandler&lt;void (IPC::Connection*, IPC::Decoder*)&gt; IPC::Connection::makeAsyncReplyCompletionHandler&lt;Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;&gt;(WTF::CompletionHandler&lt;void (WebKit::DocumentEditingContext&amp;&amp;)&gt;&amp;&amp;, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*&gt;::call(IPC::Connection*, IPC::Decoder*) + 196 18 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper&lt;WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef&lt;IPC::Encoder&gt;&amp;&amp;, WTF::OptionSet&lt;IPC::SendOption&gt;, std::__1::optional&lt;IPC::ConnectionAsyncReplyHandler&gt;, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*&gt;::call(IPC::Connection*, IPC::Decoder*) + 64 19 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef&lt;IPC::Decoder&gt;) + 340 20 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 Will the official version have this issue?
Topic: Safari & Web SubTopic: General Tags:
Replies
1
Boosts
0
Views
305
Activity
Aug ’25
WKWebView customUserAgent replaces system User-Agent with NetworkingExtension identifier on iOS 26.4
Reproduction Steps:a. Create a WKWebView instance and set a custom string to customUserAgent.b. Load any web page (e.g., https://example.com).c. Check the User-Agent field in the request headers via packet capture tools or Web Inspector. Expected Result:The custom User-Agent should be appended to the default system identifier (Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15...), instead of being completely overwritten. Actual Result:The User-Agent is fully replaced with: NetworkingExtension/8624.1.16.10.6 Network/5812.102.3 iOS/26.4, and all basic system identifiers are missing. Additional Information: Device: iPhone 16 Pro Max iOS Version: 26.4 (Build 20T5127) WKWebView setup: Directly set using the customUserAgent property Network Extension features are not used in the project, but the NetworkingExtension identifier still appears in the User-Agent
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3
Boosts
0
Views
689
Activity
4w
Applications developed using WKWebView is limited to running at 60 fps.
I'm developing a cross-platform application using Tauri, which uses WebView technology as the GUI renderer. On macOS, it should be using WKWebView. Based on my tests, all applications developed with Tauri can only run at 60fps on macOS and cannot take advantage of ProMotion displays to achieve a 120fps refresh rate, whereas the same application can run at 120fps on other platforms. I have submitted this issue to Tauri on GitHub, and it appears that this cannot be resolved through external settings, but only by modifying the WKWebView code to support higher frame rates. Is there any possible solution to this?
Topic: Safari & Web SubTopic: General Tags:
Replies
1
Boosts
0
Views
277
Activity
Aug ’25
Quic Protocol
Hi all, Managing Safari usage in an enterprise environment and I’m looking for ways to disable or restrict the QUIC protocol to enforce network-level security policies (e.g., content filtering). Does Safari offer any settings to disable QUIC, or is there a known workaround to prevent Safari from using it? Appreciate any insights or guidance.
Topic: Safari & Web SubTopic: General
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1
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266
Activity
Jun ’25
WKWebView fails to render custom app fonts in macOS 26 beta 5
This post is an effort to draw attention to a regression in Tahoe that has a large impact on our app. This bug was filed during seed 3 but remains open: FB18869578: Regression: WebView fails to render fonts registered with CTFontManagerRegisterFontURLs or ATSApplicationFontsPath The gist of it is that WKWebView fails to render text that is styled with a “font-family” that references a font that has been loaded into the app using either the ATSApplicationFontsPath Info.plist key or loaded dynamically with CTFontManagerRegisterFontURLs. The area where the text should be is just blank. There is more detail and a reproducer in the bug referenced above. We really hope this bug can get fixed before GA. If anyone else would like to try and reproduce it, you can download a test case from here: https://e3supportuploads.s3-accelerate.amazonaws.com/8739959ce24de40fa462798a532aaa99fbfc9affba4f2a3e71d397f9e30d2604
Topic: Safari & Web SubTopic: General
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1
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212
Activity
Aug ’25
guard let result = try? await evaluateJavaScript Crash
myCode is here // titleScript = "document.querySelector('#\(rawValue) span')?.textContent" guard let titleResult = try? await webView.evaluateJavaScript(type.titleScript), let title = titleResult as? String else { return } this code has error Thread 1: Swift runtime failure: Unexpectedly found nil while implicitly unwrapping an Optional value but edit Code like this It is works Successful do { ... let titleResult = try await webView.evaluateJavaScript(type.titleScript) let title = titleResult as? String ... } catch { LogManager.log(level: .error, self, #function, error, "title is Invalid : \(type.titleScript)") continue } I don't know why guard let _ = try? is Fail
Topic: Safari & Web SubTopic: General Tags:
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3
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0
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174
Activity
May ’25
Opening certain websites is making my entire browser freeze (no matter what browser I use)
Currently, im on MacOS Tahoe 26 Public Beta 2, build number 25A5327h. I just recently updated to this, and now, whenever I open some sites like Amazon, or ChatGPT, it freezes my entire browser and I have to force quit it. I tried deleting the SpeakSelection.plist file which everyone swore worked, but not for me. Is this because the new update messed with resource allocation or did my user data corrupt mid-update and i have to transfer all my stuff to a new user?
Topic: Safari & Web SubTopic: General
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1
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179
Activity
Aug ’25
As of macOS 26.4, WKWebView content disappears after 3 seconds when part of a legacy ScreenSaver view hierarchy.
The title says it all, and I've filed FB FB22353950 that includes an Xcode 26.4 Screen Saver test project, QT movie demonstrating the error, and a PDF with complete steps to build and test. I'm asking here just to learn if this sounds familiar. The SS built on 26.4 fails in 26.4, works fine on 26.3.1. I'll supply the test files if there's interest. Thanks.
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2
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0
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679
Activity
Mar ’26
Is my POST method correct
//Is my post method correct because google and claude are telling me I must use content type for the json and use .setvalue. I thought that my process was correct because I encode the data to turn into json and then make the request func createTask(_ task: Task) async throws -> Task { if let url = URL(string: "(baseURL)/todos"){ var request = URLRequest(url: url) request.httpMethod = "POST" let encoder = JSONEncoder() do{ let data = try encoder.encode(task) request.httpBody = data let (data, response) = try await URLSession.shared.data(for: request) return task //we want to make encoder and then turn the data into json and put it in body } catch{ throw JSONErrors.encodingFailed } } else{ throw URLError(.badURL) } }
Topic: Safari & Web SubTopic: General Tags:
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2
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0
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149
Activity
Aug ’25
Epic games website sign in page
Hello i would like to report a bug on iOS 26 beta. The problem is on the epic games website you see when I hit sign in it is just blank but the epic games store is just fine i would like this to be fixed on iOS 26 beta 3 thank you.
Topic: Safari & Web SubTopic: General
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1
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0
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289
Activity
Jun ’25
CSS Grid subpixel column width misalignment at non-100% zoom levels in Safari
Steps to reproduce: Create a CSS grid with fractional column widths e.g. grid-template-columns: repeat(3, 518.7875px) Set browser zoom to 85% or 115% Observe columns misalign with background-size pattern Expected: Columns render consistently at all zoom levels Actual: Subpixel rounding causes visual misalignment macOS: 13/14/15 inch MacBook
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1
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303
Activity
Feb ’26
app-site-association.cdn-apple.com | Cache not updating
We're handling our universal links (deep links) via our custom router written in express.js. We recently update our .well-known format as per: https://developer.apple.com/documentation/xcode/supporting-associated-domains Our own domain link shows them correctly if we apply cache bust to it: Normal link: https://links.sastaticket.pk/.well-known/apple-app-site-association Cache bust: https://links.sastaticket.pk/.well-known/apple-app-site-association?1 Now, since app-site cache is not updating at: https://app-site-association.cdn-apple.com/a/v1/links.sastaticket.pk Our main domain link is not getting updated response either. Its been more than 72 hours now. Any help, how to push the app-site cache to update? I can provide more context if needed, Thanks
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1
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0
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257
Activity
Mar ’26
On iOS 18.0, when setting a cookie with SameSite=None; Secure, the attribute does not take effect and is automatically converted to SameSite=Lax.
On iPhone 16 running iOS 18.0(Xcode 16.2), cookies configured with SameSite=None; Secure fail to apply correctly—iOS forcibly converts the attribute to SameSite=Lax. As a result, cross-site requests from H5 pages within our app cannot carry the required cookies, causing failures. Can anyone help me on this? Thanks in advance.
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1
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0
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257
Activity
May ’25
WKWebView in full screen shows black instead of webpage on macOS 26 beta
As you see in the image, when I fullscreen in WKWebView, it shows black instead of the webpage in full screen. It works fine in Sequoia. It has happened to me since beta 1, but I post it now, because we’re in beta 8 and it’s not fixed. What’s going on? Can somebody tell me if they have the same issue?
Topic: Safari & Web SubTopic: General Tags:
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1
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0
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395
Activity
Aug ’25
Apple Script to Automate Web Page Plot Data
Can someone please help me: I do not have the brain space (85yo) to figure out an Apple Script or Java Script app to do this simple task. I have spent a few hours each day, over several days, and have made zero progress on such an apparently simple task. I wish to create an Automator App for the macOS Safari browser that will schedule (via a Calendar Event) the download of the 48hr data behind the hourly Fuel Mix Plot Data from the AEMO Web Site, every Monday, Wednesday, Friday and Sunday. Here is the link to the AEMO web site: AEMO, Energy Systems, Electricity, National Electricity Market (NEM), Data (NEM),Data Dashboard https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem The 48 hour hourly Fuel Mix data is found by selecting the "Fuel Mix" button (which by default will display the NEM Current Trend). The 48 hour trend is displayed by tapping on the small "Current" pulldown menu, and selecting "48 hrs". The 48hr Data is down loaded by selecting the small circular button just to the right of the pulldown menu. a) AEMO Web Site: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/data-nem/data-dashboard-nem b) Main Menu, and underlying html, c) Fuel Mix menu, Pulldown list, DownLoad button, and underlying html, I am familiar with C++ and have built Xcode Apps, and used Excel Macros extensively in the past. Thank you. Robert.
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2
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224
Activity
Jun ’25
Using multiple apple-developer-merchantid-domain-association files to support Apple Pay through different payment gateways
I'm in the process of supporting Apple Pay through a 2nd payment gateway for some users, so I need to support two separate Apple Pay relationships. Both require their own apple-developer-merchantid-domain-association. I don't see how I can have both files for the one domain. Is this possible? Is there a workaround other than just replacing the old file with the new one and hoping that doesn't disrupt anything. That seems to be the approach taken by others (https://developer.apple.com/forums/thread/695538) but it is too high risk for me without any confirmation from Apple that this is ok. I'd also like to avoid having to setup a 2nd domain for these customers, since the current domain is already quite embedded in their operations.
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1
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0
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1.1k
Activity
Feb ’26
WKWebView requires authentication
I use WKWebView to display a webpage that requires authentication through an authentication provider. This works as expected, but when I close and reopen the app, I have to reauthenticate. However, if I open the same page in Safari, I only have to authenticate once. If I close Safari and reopen it, the page displays without prompting me to authenticate again. I see some cookies stored in httpCookieStore, so I assume that storing cookies works. Does anyone have an idea why authentication is not persistent between app launches? Thanks in advance. Best regards, Marc
Topic: Safari & Web SubTopic: General Tags:
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3
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0
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224
Activity
Jul ’25