Our app encountered a new crash since beta5(23A5308g) released last week,and it seems the crash is not solved yet in beta6(23A5318c).The crash stack below `-[UIView _backing_setPosition:] -[UIView setCenter:] -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] ___54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] -[_UIEditMenuContentPresentation _displayMenu:reason:] -[_UIEditMenuContentPresentation displayMenu:configuration:] ___58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke ___80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke ___109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke ___107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) WTF::Detail::CallableWrapper<IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)> >(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::{lambda(IPC::Connection*, IPC::Decoder*)#1}, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRefIPC::Encoder&&, WTF::OptionSetIPC::SendOption, std::__1::optionalIPC::ConnectionAsyncReplyHandler, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) IPC::Connection::dispatchMessage(WTF::UniqueRefIPC::Decoder) IPC::Connection::dispatchIncomingMessages() WTF::RunLoop::performWork() WTF::RunLoop::performWork(void*) _CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION ___CFRunLoopDoSource0 ___CFRunLoopDoSources0 ___CFRunLoopRun __CFRunLoopRunSpecificWithOptions _GSEventRunModal -[UIApplication _run] _UIApplicationMain main main.m start

Steps to Reproduce: Open the Bing search page in Safari (example URL: https://www.bing.com/search?q=webkit&form=APIPH1&PC=APPL). Pinch-zoom in or out, then return the page to exactly 100% zoom. Rotate the device from portrait to landscape orientation. Observe that the page is incorrectly scaled to a value other than 100%. Rotate the device back to portrait orientation. The page remains at the incorrect zoom level. Expected Result: After returning the page to 100% zoom, changing orientation should keep the zoom level at exactly 100% in both portrait and landscape modes. Actual Result: After returning to 100% zoom, rotating to landscape changes the zoom to a non-100% value, and rotating back to portrait retains the incorrect zoom level.

Environment • Device: iOS 26 Developer Beta 5 (23A5308g) • Xcode: 16.3 Short description The app crashes the moment the user tries to long-press to select text inside a WKWebView, double-tap an image with Text (magnifier appears) The exception is CALayer position contains NaN. frame = (nan,0;0,48) chorPoint=(inf, 0) and it is thrown in the UI process. Build &amp; run any project that hosts a WKWebView. Inject the following CSS via script (this is what we do to suppress the native callout menu): WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:[WKWebViewConfiguration new]]; NSString *js = @"document.documentElement.style.webkitUserSelect='none';" "document.documentElement.style.webkitTouchCallout='none';"; [webView evaluateJavaScript:js completionHandler:nil]; [self.view addSubview:webView]; Incident Identifier: EE6FB046-5087-4F15-A72D-A74965347A30 CrashReporter Key: 29e8e58e02a07557adb4ce3f463d764f3ce8bbd5 Hardware Model: iPhone16,1 Process: wallet [642] Path: /private/var/containers/Bundle/Application/4B4E609A-C8BF-4C56-AB2A-1638249B98A5/wallet.app/wallet Identifier: xxxx Version: xxxx AppStoreTools: 16F7 AppVariant: 1:iPhone16,1:18 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: xxxxx Date/Time: 2025-08-06 12:05:24.0732 +0800 Launch Time: 2025-08-06 11:49:40.3802 +0800 OS Version: iPhone OS 26.0 (23A5308g) Release Type: Beta Baseband Version: 3.02.02 Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: SIGNAL 6 Abort trap: 6 Terminating Process: wallet [642] Triggered by Thread: 0 Application Specific Information: abort() called Last Exception Backtrace: 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 21 JavaScriptCore 0x19a8f85d4 WTF::RunLoop::performWork() + 552 22 JavaScriptCore 0x19a8f838c WTF::RunLoop::performWork(void*) + 36 23 CoreFoundation 0x185da6230 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 24 CoreFoundation 0x185da61a4 __CFRunLoopDoSource0 + 172 25 CoreFoundation 0x185d83c6c __CFRunLoopDoSources0 + 232 26 CoreFoundation 0x185d598b0 __CFRunLoopRun + 820 27 CoreFoundation 0x185d58c44 _CFRunLoopRunSpecificWithOptions + 532 28 GraphicsServices 0x224ce0498 GSEventRunModal + 120 29 UIKitCore 0x18b6c84b8 -[UIApplication _run] + 792 30 UIKitCore 0x18b66cbc0 UIApplicationMain + 336 31 wallet 0x1046f8558 0x1046f4000 + 17752 32 dyld 0x182dcdb18 start + 6332

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

version:26.0-23A5308g Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan 103.667]. Layer: <CALayer:0x15793f720; position = CGPoint (0 0); bounds = CGRect (0 0; 0 48); delegate = <_UIEditMenuListView: 0x10f962f80; frame = (nan 0; 0 48); anchorPoint = (inf, 0); alpha = 0; layer = <CALayer: 0x15793f720>>; sublayers = (<CALayer: 0x155964e70>, <CALayer: 0x15793eaf0>); opaque = YES; allowsGroupOpacity = YES; anchorPoint = CGPoint (inf 0); opacity = 0>'

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?

On my native app, will open a wkWebview to display some content. And it will crash on iOS26: *** Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan 103.667]. Layer: <CALayer:0x14c2457d0; position = CGPoint (0 0); bounds = CGRect (0 0; 0 48); delegate = <_UIEditMenuListView: 0x14c273980; frame = (nan 0; 0 48); anchorPoint = (inf, 0); alpha = 0; layer = <CALayer: 0x14c2457d0>>; sublayers = (<CALayer: 0x1306320a0>, <CALayer: 0x14c245a70>); opaque = YES; allowsGroupOpacity = YES; anchorPoint = CGPoint (inf 0); opacity = 0>'

I'm trying to download mods for Stardew Valley, before the beta it worked but now it doesn't. Is there anyone who can help to fix this? Used Firefox and Safari as well as Safari on my ipad.

How did you test apple-app-site-association in non-production environments that are usually not public?

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?

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?

Environment • Device: any iPhone running iOS 26 Developer Beta 5 (23A5308g) • Xcode: 16.3 Short description The app crashes the moment the user tries to long-press to select text inside a WKWebView, double-tap an image with Text (magnifier appears) The exception is CALayer position contains NaN. frame = (nan,0;0,48) chorPoint=(inf, 0) and it is thrown in the UI process. Build & run any project that hosts a WKWebView. Inject the following CSS via script (this is what we do to suppress the native callout menu): WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:[WKWebViewConfiguration new]]; NSString *js = @"document.documentElement.style.webkitUserSelect='none';" "document.documentElement.style.webkitTouchCallout='none';"; [webView evaluateJavaScript:js completionHandler:nil]; [self.view addSubview:webView]; Incident Identifier: EE6FB046-5087-4F15-A72D-A74965347A30 CrashReporter Key: 29e8e58e02a07557adb4ce3f463d764f3ce8bbd5 Hardware Model: iPhone16,1 Process: wallet [642] Path: /private/var/containers/Bundle/Application/4B4E609A-C8BF-4C56-AB2A-1638249B98A5/wallet.app/wallet Identifier: xxxxxxx Version: xxxx AppStoreTools: 16F7 AppVariant: 1:iPhone16,1:18 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: xxxxxx Date/Time: 2025-08-06 12:05:24.0732 +0800 Launch Time: 2025-08-06 11:49:40.3802 +0800 OS Version: iPhone OS 26.0 (23A5308g) Release Type: Beta Baseband Version: 3.02.02 Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: SIGNAL 6 Abort trap: 6 Terminating Process: wallet [642] Triggered by Thread: 0 Application Specific Information: abort() called Thread 0 Crashed: 0 libsystem_kernel.dylib 0x22da0f0cc __pthread_kill + 8 1 libsystem_pthread.dylib 0x1e097b7e8 pthread_kill + 268 2 libsystem_c.dylib 0x191361f1c abort + 124 3 libc++abi.dylib 0x182e7a808 __abort_message + 132 4 libc++abi.dylib 0x182e69484 demangling_terminate_handler() + 304 5 libobjc.A.dylib 0x182d7bf28 _objc_terminate() + 156 6 wallet 0x1068ff8c8 0x1046f4000 + 35698888 7 libc++abi.dylib 0x182e79bdc std::__terminate(void (*)()) + 16 8 libc++abi.dylib 0x182e7d314 __cxxabiv1::failed_throw(__cxxabiv1::__cxa_exception*) + 88 9 libc++abi.dylib 0x182e7d2bc __cxa_throw + 92 10 libobjc.A.dylib 0x182d7992c objc_exception_throw + 448 11 CoreFoundation 0x185e908d4 +[NSException raise:format:] + 128 12 QuartzCore 0x18678a874 CA::Layer::set_position(CA::Vec2<double> const&, bool) + 160 13 QuartzCore 0x1869a7270 -[CALayer setPosition:] + 52 14 UIKitCore 0x18c4ac564 -[UIView _backing_setPosition:] + 176 15 UIKitCore 0x18cefdf0c -[UIView setCenter:] + 220 16 UIKitCore 0x18cd9f794 -[_UIEditMenuContentPresentation _displayPreparedMenu:titleView:reason:didDismissMenu:configuration:] + 936 17 UIKitCore 0x18cd9f3c0 __54-[_UIEditMenuContentPresentation _displayMenu:reason:]_block_invoke + 104 18 UIKitCore 0x18ced1060 -[UIEditMenuInteraction _editMenuPresentation:preparedMenuForDisplay:completion:] + 384 19 UIKitCore 0x18cd9f2e4 -[_UIEditMenuContentPresentation _displayMenu:reason:] + 304 20 UIKitCore 0x18cd9f0d8 -[_UIEditMenuContentPresentation displayMenu:configuration:] + 64 21 UIKitCore 0x18ced0344 __58-[UIEditMenuInteraction presentEditMenuWithConfiguration:]_block_invoke + 260 22 UIKitCore 0x18ced1f8c __80-[UIEditMenuInteraction _prepareMenuAtLocation:configuration:completionHandler:]_block_invoke + 80 23 UIKitCore 0x18cc8403c __109-[UITextContextMenuInteraction _editMenuInteraction:menuForConfiguration:suggestedActions:completionHandler:]_block_invoke + 180 24 UIKitCore 0x18cc84584 __107-[UITextContextMenuInteraction _querySelectionCommandsForConfiguration:suggestedActions:completionHandler:]_block_invoke + 148 25 WebKit 0x1a05ae5d4 WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>::operator()(WebKit::DocumentEditingContext&&) + 64 26 WebKit 0x1a05bb468 WTF::Detail::CallableWrapper<WTF::CompletionHandler<void (IPC::Connection*, IPC::Decoder*)> IPC::Connection::makeAsyncReplyCompletionHandler<Messages::WebPage::RequestDocumentEditingContext, WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>>(WTF::CompletionHandler<void (WebKit::DocumentEditingContext&&)>&&, WTF::ThreadLikeAssertion)::'lambda'(IPC::Connection*, IPC::Decoder*), void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 196 27 WebKit 0x19fcf5db8 WTF::Detail::CallableWrapper<WebKit::AuxiliaryProcessProxy::sendMessage(WTF::UniqueRef<IPC::Encoder>&&, WTF::OptionSet<IPC::SendOption>, std::__1::optional<IPC::ConnectionAsyncReplyHandler>, WebKit::AuxiliaryProcessProxy::ShouldStartProcessThrottlerActivity)::$_1, void, IPC::Connection*, IPC::Decoder*>::call(IPC::Connection*, IPC::Decoder*) + 64 28 WebKit 0x19fce54f0 IPC::Connection::dispatchMessage(WTF::UniqueRef<IPC::Decoder>) + 340 29 WebKit 0x19fcf5aa0 IPC::Connection::dispatchIncomingMessages() + 536 30 JavaScriptCore 0x19a8f85d4 WTF::RunLoop::performWork() + 552 31 JavaScriptCore 0x19a8f838c WTF::RunLoop::performWork(void*) + 36 32 CoreFoundation 0x185da6230 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 33 CoreFoundation 0x185da61a4 __CFRunLoopDoSource0 + 172 34 CoreFoundation 0x185d83c6c __CFRunLoopDoSources0 + 232 35 CoreFoundation 0x185d598b0 __CFRunLoopRun + 820 36 CoreFoundation 0x185d58c44 _CFRunLoopRunSpecificWithOptions + 532 37 GraphicsServices 0x224ce0498 GSEventRunModal + 120 38 UIKitCore 0x18b6c84b8 -[UIApplication _run] + 792 39 UIKitCore 0x18b66cbc0 UIApplicationMain + 336 40 wallet 0x1046f8558 0x1046f4000 + 17752 41 dyld 0x182dcdb18 start + 6332

Our app, VitalSource Bookshelf, is an EPUB reader that uses a WKWebView to display book content. The EPUB content format is XHTML and uses namespaces (for the epub:type declaration). On beta 4, the webkit process repeatedly crashes when loading our content. The crash appears to be in the XML parser. Here's what's at the top of the stack trace: 0 WebCore 0x19166a878 WebCore::XMLDocumentParser::startElementNs(unsigned char const*, unsigned char const*, unsigned char const*, int, unsigned char const**, int, int, unsigned char const**) + 4968 1 libxml2.2.dylib 0x19c5a2bd0 xmlParseStartTag2 + 3940 2 libxml2.2.dylib 0x19c59e730 xmlParseTryOrFinish + 2984 3 libxml2.2.dylib 0x19c59d8e4 xmlParseChunk + 708 4 WebCore 0x191668ec8 WebCore::XMLDocumentParser::doWrite(WTF::String const&) + 636 5 WebCore 0x191665b78 WebCore::XMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl, WTF::RawPtrTraits<WTF::StringImpl>, WTF::DefaultRefDerefTraits<WTF::StringImpl>>&&) + 304 6 WebCore 0x190105db0 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter&, std::__1::span<unsigned char const, 18446744073709551615ul>) + 268 7 WebCore 0x190861c3c WebCore::DocumentLoader::commitData(WebCore::SharedBuffer const&) + 1488 8 WebKit 0x18e07ca3c WebKit::WebLocalFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, WebCore::SharedBuffer const&) + 52 9 WebCore 0x190869db4 WebCore::DocumentLoader::commitLoad(WebCore::SharedBuffer const&) + 228 10 WebCore 0x1909521e4 WebCore::CachedRawResource::notifyClientsDataWasReceived(WebCore::SharedBuffer const&) + 268 I was able to reproduce this in Safari on beta 4 just by opening the following trivial xhtml file from the file system - it does the same thing it does in our app, which is reloads and crashes several times, followed by the "A problem repeatedly occurred with..." error message. <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" epub:prefix="vst: http://vitalsource.com/"><head></head><body class="dash" epub:type="chapter" data-begin-o="0" data-begin-o2="0" data-begin-o3="0" data-o="0" id="eid1844" data-end-o="14703" data-end-o2="14703" data-end-o3="14703"><h2 class="title" data-o="0" id="eid1845" data-out="33"><span class="label" data-o="0" id="eid1846"><span class="label-inner"><b data-o="0" id="eid1847">CHAPTER X</b> </span></span>THE SUBMARINE COAL-MINES</h2></body></html> I've also filed a feedback. But posting here just to raise the visibility - this is critical for us. I think it was introduced in beta 4; that's at least when we first noticed it. It was working in the earlier betas, I just don't remember if I tried beta 3 or not. It happens on iOS, macOS, and iPadOS. This has never been a problem in any earlier release of macOS / iOS.

We use a direct link mechanism in our app that attempts to open the app if it's already installed; otherwise, it redirects the user to the App Store. However, when the app is not installed, Safari displays an alert saying: "Safari cannot open the page because the address is invalid." This popup appears to be caused by attempting to open a custom URL scheme that doesn't resolve. what is the recommendation from apple to have a smooth transition to our mobile App Here’s a sample link we’re using: https://new.oneclear.com/Asset/fe5f7fb6-205a-40f8-9efe-71678361aa2c?t=NTA0NQ==

Hello, I am developing a website which starts a web worker using the js code: const zarrWorker = new Worker('./zarr_file.js', { type: 'module' });. The script 'zarr_file.js' is served from the same origin with Cross-Origin-Embedder-Policy: require-corp and Cross-Origin-Opener-Policy: same-origin and it is importing external modules through the import statement (e.g. import * as zarr from "https://cdn.jsdelivr.net/npm/zarrita/+esm";). All the external modules are blocked by Safari with the error Worker load was blocked by Cross-Origin-Embedder-Policy, although I can see (by running curl on them) that they correctly set cross-origin-resource-policy: cross-origin`. The same website works fine in Chrome and Firefox. Is it a bug or is Safari implementing stricter policies? In the latter case what would be the solution?

While implementing Apple Maps into our web application, I have a scenario where I want to be able to drag and move some of my custom annotations around. While that is working, when "picking up" the annotation before dragging it, there is an animation which I believe is to represent the human interaction of picking up a pin from a map, I would like to cancel that animation and thought that would be possible by calling preventDefault() in the emitted long-press event, which the documentation states that annotations should emit if they are draggable. The thing is that I don't get this event to emit when long pressing an annotation. So I believe that I have found a bug. It's in this paragraph in the documentation https://developer.apple.com/documentation/mapkitjs/handling-map-events#Respond-to-map-interaction-events A long press occurs on the map outside an annotation. A long press may be the beginning of a panning or pinching gesture on the map. You can prevent the gesture from starting by calling the preventDefault() method of the event. Annotations need to be draggable to dispatch long-press events. In anybody else experiencing this or do you see any clear fix for this? Maybe there is another way to cancel that "picking up the annotation for dragging" animation. I have seemed to try anything else.

Body:
Hi all, I’m seeing a puzzling discrepancy in behavior between NSURLSession (with multipathServiceType = NSURLSessionMultipathServiceTypeInteractive) and WKWebView when the device is connected to a Wi-Fi SSID that has no internet (e.g., a hardware device’s AP). I have the Multipath entitlement properly enabled, and in this scenario: NSURLSession requests automatically fall back to cellular and succeed (no user intervention, fast switch). WKWebView loads fail or stall: the web content does not appear, and it seems like the web view is not using the cellular path even though the system network path becomes satisfied and real Internet reachability is confirmed. Environment: iOS version: (e.g., iOS 18.4) Device: (e.g., iPhone 15 Pro) Multipath entitlement: enabled in the app, using NSURLSessionMultipathServiceTypeInteractive Connected SSID: hardware device Wi-Fi with no external internet Expected fallback: automatic to cellular once the Wi-Fi has no internet, as observed with NSURLSession What I’ve done / observed: NSURLSession using Multipath works as expected:
NSURLSessionConfiguration *cfg = [NSURLSessionConfiguration defaultSessionConfiguration];
cfg.multipathServiceType = NSURLSessionMultipathServiceTypeInteractive;
NSURLSession *session = [NSURLSession sessionWithConfiguration:cfg];
NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.apple.com/library/test/success.html"]];
NSURLSessionDataTask *task = [session dataTaskWithRequest:req completionHandler:^(NSData *data, NSURLResponse *resp, NSError *err) {
NSLog(@"NSURLSession result: %@, error: %@", resp, err);
}];
[task resume];
When connected to the device Wi-Fi (no external internet), the session quietly shifts to cellular and completes successfully. WKWebView fails to load under the same conditions:
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.apple.com/library/test/success.html"]]];
The web view either shows a load failure or just hangs, even though lower-level monitoring reports that the network path is satisfied and real Internet connectivity is available. Network path monitoring logic: I use the C API nw_path_monitor to watch for nw_path_status_satisfied. Once satisfied is observed, I perform a true connectivity check using nw_connection (e.g., connecting tohttps://www.apple.com/library/test/success.html) to verify that real Internet traffic can flow over cellular. That check passes, confirming fallback to cellular, but WKWebView still does not load content. Meanwhile, NSURLSession requests in the same condition succeed immediately. Sample logging trace:
[+] nw_path_status_satisfied=1, hasWiFi=1, hasCellular=1
[+] Internet connectivity test: ready (via nw_connection)
[-] WKWebView load failed / stalled
[+] NSURLSession request completed successfully Questions: Why does NSURLSession with the multipath service type seamlessly use cellular when the Wi-Fi has no internet, but WKWebView does not exhibit the same fallback behavior? Is WKWebView not honoring the system’s multipath fallback the same way? Does it use a different networking stack or ignore the multipath entitlement in this scenario? Is there a supported way to force WKWebView to behave like NSURLSession here? For example, can I bridge content through a multipath-enabled NSURLSession and inject it into WKWebView via a custom scheme? Are there any WKWebView configuration flags, preferences, or policies that enable the same automatic interface switching? Are there known limitations or documented differences in how WKWebView handles network interface switching, path satisfaction, or multipath compared to raw NSURLSession? What I’ve ruled out / tried: Verified the Multipath entitlement is included and active. Confirmed network path is “satisfied” and that real Internet reachability succeeds before calling [webView loadRequest:]. Delayed the WKWebView load until after connectivity verification. Observed that NSURLSession requests succeed under identical connectivity conditions. Any insight into internal differences, recommended workarounds, or Apple-recommended patterns for making web content robust in a “Wi-Fi with no internet” + automatic fallback-to-cellular scenario would be greatly appreciated. Thank you!

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