Hello, We’ve been using the CesiumJS WebGL library for several years, both on our website and within embedded WebViews in our iOS application. Since upgrading to iOS versions 18.2 and 18.3, we’ve started receiving numerous user complaints regarding application crashes on various iPad and iPhone models when loading CesiumJS. The crashes occur as soon as the 3D view initializes, and the error consistently reported is: "WebGL context lost" This issue appears to be a WebGL-related crash potentially triggered by GPU memory handling or allocation limits. However, we are not detecting any abnormal memory consumption prior to the crash, and the same setup works perfect on older iOS versions and on all Android devices and versions. Steps to Reproduce: Open: https://www.flightradar24.com/30.47,-94.84/8 Click on any aircraft icon on the map. In the aircraft details panel at the bottom, click on the “3D view” tab. On iOS 18.2 or 18.3, the page will crash shortly after initializing CesiumJS WebGL. Affected Devices: This issue is occurring across a wide range of devices, including: iPad 9th Generation iPad Pro (11-inch, 2nd Gen) iPhone SE (2020 and 2022) iPhone 11, 11 Pro iPhone XR iPhone Mini All of the above are running iOS 18.2 or 18.3. The problem does not occur on Android or previous iOS versions. Request: Has anyone else encountered similar issues with WebGL context loss after upgrading to iOS 18.2 or 18.3? Are there any known changes in memory limits or WebGL behavior in these recent iOS updates? We’d appreciate any insight or suggestions on workarounds or potential fixes. Thank you!

Hi, We are facing a major issue with our application. We are using FolioReaderkit to read epub files. Currently, it's working on the iOS 18.1 device and simulator, but it's not working on the iOS 18.2 and later version devices. we are facing this error in Folioreaderkit

Dear Apple Technical Support Team, We have encountered a potential issue related to transaction handling while using StoreKit v2, and would greatly appreciate your assistance in confirming the behavior or providing any relevant guidance. Issue Description: When calling Transaction.unfinished and listening to Transaction.updates on the client side, we noticed that some transactions—despite having already been processed and successfully completed with finish()—are being returned again upon the next app launch, which results in duplicate receipt uploads. Current Handling Flow: 1. Upon app launch: • Iterate over Transaction.unfinished to retrieve unfinished transactions; • Simultaneously listen for transaction changes via Transaction.updates (e.g., renewals, refunds); 2. For each verified transaction, we immediately call await transaction.finish(); 3. We then construct a transaction model, store it locally, and report it to our backend for receipt verification; 4. After the server successfully verifies the receipt, the client deletes the corresponding local record; 5. On every app launch, the client checks for any locally stored receipts that haven’t been uploaded, and re-uploads them if necessary. Key Code Snippets: private static func verifyReceipt(receiptResult: VerificationResult) -> Transaction? { switch receiptResult { case .unverified(_, _): return nil case .verified(let signedType): return signedType } } public static func handleUnfinishedTransactions(payConfig: YCStoreKitPayConfig, complete: ((YCStoreKitReceiptModel?) -> Void)?) { Task.detached { for await unfinishedResult in Transaction.unfinished { let transaction = YCStoreKitV2Manager.verifyReceipt(receiptResult: unfinishedResult) if let transaction { await transaction.finish() if transaction.revocationDate == nil { let receipt = YCStoreKitV2Manager.createStoreKitReceiptModel( transation: transaction, jwsString: unfinishedResult.jwsRepresentation, payConfig: payConfig, isRenew: false ) complete?(receipt) } } } } } private func observeTransactionUpdates() -> Task<Void, Never> { return Task { for await updateResult in Transaction.updates { let transaction = YCStoreKitV2Manager.verifyReceipt(receiptResult: updateResult) if let transaction { await transaction.finish() if transaction.revocationDate == nil { let receipt = YCStoreKitV2Manager.createStoreKitReceiptModel( transation: transaction, jwsString: updateResult.jwsRepresentation, payConfig: self.payConfig, isRenew: false ) self.callProgressChanged(.receiptPrepared, receiptModel: receipt, errorType: .none, error: nil) } } } } } Our Questions: 1. Is it possible for Transaction.unfinished or Transaction.updates to return transactions that have already been finished? Specifically, if a transaction was successfully finished in a previous app launch, could it still be returned again during the next launch? 2. Are there any flaws in our current handling process? Our current sequence is: finish() → construct model → local save → report to server → delete after verification. Could this order lead to timing issues where StoreKit considers a transaction unfinished? 3. If we need your assistance in investigating specific user transaction records or logs, what key information should we provide? We greatly appreciate your support and look forward to your response to help us further optimize our transaction processing logic.

The attached file bellow contains the full error error I clone this repo to my mac, change team id and group, and run it in Xcode: https://github.com/protonpass/ios-pass There's no issue when I ran it with the Debug configuration, but when I go to Product > Scheme > Edit Scheme and change the iOS target build configuration to Release then I got that error above. I have tried Archive and export the ipa, verify that the provisioning profile contains my Mac UDID, but when double clicking the ipa to install, I also got the error This app cannot be installed because its integrity could not be verified.

I've got an iOS app with lots of extensions, some of them complex and doing a lot of stuff. After a bug I'd like to be able to use OSLogStore to get a holistic picture of logging for the app and its extensions and send that to a debugging server to retrospectively view logs for the app and its extensions. The constructor is OSLogStore.init(scope: OSLogStore.Scope), however scope only has one value .currentProcessIdentifier. Implying if that is called from within the app it can only get access to logging for its process only. I tried it out to confirm this is the case - if I log something in an extension (using Logger), then run the app with code like this:  let logStore = try! OSLogStore(scope: .currentProcessIdentifier)  let oneHourAgo = logStore.position(date: Date().addingTimeInterval(-3600)) let allEntries = try! logStore.getEntries(at: oneHourAgo)       for entry in allEntries { look at the content of the entry Then none of the entries are from the extension. Is there anyway from within the app I can access logging made within an extension?

We have a macOS application which interacts with our USB and PCI devices to perform SCSI and NVME commands on them. We use IOUSBHost, IOUSBLib and IOKitLib for USB interface and have created a custom driver to interact with PCI devices. Is there a way we can implement a similar functionality for iOS as well if we connect the cards and readers using OTG?

I'm using the iOS simulator with a StoreKit configuration file. I can see that there have been transactions while the app has been closed, but my StoreKit 2 listener is never called with those updates to be able to finish them When I open my app from a cold start. I've added a listener on application(_:didFinishLaunching:launchOptions:) like this: func startObservingTransactions() { task = Task(priority: .background) { for await result in Transaction.updates { if case .verified(let transaction) = result { await transaction.finish() } } } } But the Transaction.updates loop never gets called (have added breakpoints to check). It's only ever called when a purchase is made, or subsequent transaction renewals when the app is open. Only then it will get the previously unfinished transactions. Steps to reproduce: Create an app with a StoreKit config file (with sped up transactions) to purchase an item Make a purchase then quit the app Wait for a bit for more transactions to be made while the app is closed. Open the app from a cold start and none of the transactions will be finished by the listener in your app. Cancel the subscription via the transaction manager. Close and open the app from a cold start. The first transaction will be finished by the listener but none of the others will be. In Apple's docs it says If your app has unfinished transactions, the listener receives them immediately after the app launches Why is this not the case?

Recently, we have encountered some users who have been unable to open the enterprise signature application after upgrading to version 18.3.2, without an IPS file. Through system logs, we found that signature verification has occurred SecKeyVerifySignature failed: Error Domain=NSOSStatusErrorDomain Code=-50 "rsa_pub_crypt failed, ccerr=-7" UserInfo={numberOfErrorsDeep=0, NSDescription=rsa_pub_crypt failed, ccerr=-7} Waiting for the information, I will provide the obtained system logs below. The application package name that crashed is com. mobile. moa aa.txt new

Hello all. I am currently working on a bug that has recently grown due to the beta release of iOS 18.4. I am unable to reproduce the crash at the moment; however, given that the bug is mostly exclusive to 18.4, I was wondering if this is a known issue or one specific to my app? App crashes on the main thread with EXC_BREAKPOINT. Below is the truncated stack trace before the crash: 0x000000018fff6044 (CoreText + 0x00069044) TLine::EnumerateCaretOffsets(std::__1::function<void (double, long, bool, bool*)>) const 0x000000018fff5938 (CoreText + 0x00068938) TLine::EnumerateCaretOffsets(std::__1::function<void (double, long, bool, bool*)>) const 0x000000018fff478c (CoreText + 0x0006778c) TLine::CharIndexToOffsets(long) const 0x000000018fff4564 (CoreText + 0x00067564) CTLineGetOffsetForStringIndex ... [internal code] Aside: I wonder if this has anything to do with some visibly hidden unicode characters.

I'm calling a method with the context as parameter, within the context's perform block – is this really not legal in Swift 6? actor MyActor { func bar(context: NSManagedObjectContext) { /* some code */ } func foo(context: NSManagedObjectContext) { context.performAndWait { self.bar(context: context) // WARN: Sending 'context' risks causing data races; this is an error in the Swift 6 language mode // 'self'-isolated 'context' is captured by a actor-isolated closure. actor-isolated uses in closure may race against later nonisolated uses // Access can happen concurrently } } } The warning appears when I call a method with a context parameter, within the performAndWait-block. Background: In my app I have methods that takes in API data, and I need to call the same methods from multiple places with the same context to store it, and I do not want to copy paste the code and have hundreds of lines of duplicate code. Is there a well-known "this is how you should do it" for situations like this? This is related to a previous post I made, but it's a bit flimsy and got no response: https://developer.apple.com/forums/thread/770605

I'm developing a per-app VPN iOS app with Wireguard. For that, I created a configuration file with payload type "com.apple.vpn.managed.applayer". Using the MDM server I installed some apps which need to use the VPN connection. But when I open these apps, I could see the VPN getting enabled in the device. The VPN icon appears on the notification bar but no internet connection. The VPN and internet is working correctly if I change the payload type to "com.apple.vpn.managed" in configuration file.

I have a visionOS app that I’m adding support for IOS and will like to keep using RealityView. I know there are the following modifiers to add some navigation .realityViewCameraControls(.orbit) .realityViewCameraControls(.dolly) .realityViewCameraControls(.pan) But how can I add more than one? For example I would like to orbit with one finger, Pan with 2 fingers and dolly by pinching. Is this possible and if so can someone share some sample code on how to achieve that? Thanks, Guillermo

I’m experiencing an issue in WKWebView on iOS 26 Developer Beta 8. If a view's subview contains a WKWebView, using the CALayer's renderInContext method fails to capture the pixel at the current point, and the console outputs "unsupported surface format: &b38". The following code snippet was functioning as expected on iOS 18 and iOS 26 beta 1. However, it no longer works in the latest beta. Is this a known bug in the current iOS 26 betas, or is there a recommended workaround? - (BOOL)isTransparentAtTouchPoint:(CGPoint)point layer:(CALayer *)layer { unsigned char pixel[4] = {0}; CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(pixel, 1, 1, 8, 4, colorSpace, (CGBitmapInfo) kCGImageAlphaPremultipliedLast); CGContextTranslateCTM(context, -point.x, -point.y); [layer renderInContext:context]; CGContextRelease(context); CGColorSpaceRelease(colorSpace); CGFloat alpha = pixel[3] / 255.0f; return alpha < 0.01; }

We are observing unexpected behavior in Apple Push Notification Service (APNS) delivery and would appreciate clarification and guidance. Below is a detailed breakdown of the scenario and related questions. Abbreviations: APNP – Apple Push Notification Provider APNS – Apple Push Notification Service Scenario: User1 is registered on iOS device1. Flight Mode is enabled on iOS device1. User2 initiates a call to User1 (Time t = 0 sec). User2 cancels the outgoing call after 5 seconds (Time t = 5 sec). Flight Mode is disabled on iOS device1 after 20 seconds (Time t = 25 sec). Observation: iOS device1 displays an incoming call notification (CallKit UI) after flight mode is turned off, despite the call being cancelled by User2. This notification disappears automatically after approximately 8–10 seconds. Logic Flow: At time t = 0, our APNP sends a VoIP push (priority) to APNS for the incoming call. Since device1 is in flight mode, APNS cannot deliver the push. At t = 25 sec, after flight mode is turned off, APNS delivers the cached VoIP push to device1. The app takes ~5 seconds to initialize (CSDK setup, SIP registration, etc.). It eventually receives a SIP NOTIFY with state="full" and empty dialog info (indicating no active call). Consequently, the CallKit incoming call is removed after ~8 seconds. Questions: → We set the apns-expiration header to 0, expecting that the VoIP push would not be delivered if the device was unreachable when the push was sent. However, APNS still delivers the push 20–30 seconds later, once the device is back online. Q. Why is the apns-expiration header not respected in this case? → Upon receiving the VoIP push, we require ~10–12 seconds to determine if a visible CallKit notification is still relevant (e.g., by completing SIP registration and checking for active dialogs). Q. Is it acceptable, per Apple guidelines, to intentionally delay showing the CallKit UI (incoming call) for 10–15 seconds after receiving the VoIP push? → Apple documentation states that the priority VoIP push channel should be used only for notifying incoming calls, while regular (non-VoIP) pushes should be used for other updates, including call cancellations. Q. What is the rationale behind discouraging the use of the priority VoIP push channel for call cancellation events? In some cases, immediate cancellation notification is as critical as the initial incoming call. Would Apple consider it acceptable to occasionally use the priority VoIP channel for rare call-cancellation scenarios without risking throttling or suspension? → In our implementation, we send an incoming call notification via the priority VoIP channel. Shortly after, we send a call cancellation notification on the regular push channel, marked with "content-available": 1. We expect this regular push to wake the app (triggering application:didReceiveRemoteNotification:fetchCompletionHandler:), but in practice the app never wakes, and our debug logs inside that delegate method never appear. Q. Under what exact conditions does a "content-available": 1 regular push fail to wake the app when it follows a VoIP push? Are there additional requirements (e.g., background modes, rate limits, power optimizations) that could prevent the delegate from being called? → According to Apple documentation: “APNs stores only one notification per bundle ID. When multiple notifications are sent to the same device for the same bundle ID, APNs keeps only the latest one.” However, in our tests: If a device is offline when APNs receives both: (a) a priority VoIP push for an incoming call, (b) a regular push for call cancellation (same bundle ID), Upon the device reconnecting, APNs still delivers the earlier VoIP push, instead of discarding it and delivering only the most recent (cancellation) notification. Q. Why doesn’t APNs replace the queued VoIP push with the newer regular push when both share the same bundle ID? Is this expected behavior due to channel type differences (VoIP vs. regular), or is there a way to ensure that the latest notification (even if regular) supersedes the earlier VoIP push? We’d appreciate your input or recommendations on handling such delayed pushes and any best practices for VoIP push expiration handling and call UI timing.

Hey everyone, Just wanted to share a critical issue we’ve encountered while testing our app on iOS 18 simulators and devices using Xcode 26 Beta 3: Crash Details We're seeing the following fatal exception during launch: NSInvalidUnarchiveOperationException Could not instantiate class named _TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView_ because no class named _TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView_ was found... The crash originates from Storyboards/XIBs that include a UIToolbar. It appears UIKit is referencing an internal SwiftUI-related class (UICoreHostingView), which isn't present at runtime — leading to immediate crashes. Affected: Apps using UIToolbar in Storyboards or XIBs Running on iOS 18 (Simulators or Devices) and below Built using Xcode 26 Beta 3 CrashLog: Fatal Exception: NSInvalidUnarchiveOperationException 0 CoreFoundation 0x11a21c __exceptionPreprocess 1 libobjc.A.dylib 0x31abc objc_exception_throw 2 CoreFoundation 0x178ea0 -[NSException initWithCoder:] 3 UIFoundation 0x28774 UINibDecoderDecodeObjectForValue 4 UIFoundation 0x28a18 UINibDecoderDecodeObjectForValue 5 UIFoundation 0x28cac -[UINibDecoder decodeObjectForKey:] 6 UIKitCore 0x21e680 -[UIView initWithCoder:] 7 UIKitCore 0x9b4784 -[UIToolbar initWithCoder:] 8 UIFoundation 0x28890 UINibDecoderDecodeObjectForValue 9 UIFoundation 0x28cac -[UINibDecoder decodeObjectForKey:] 10 UIKitCore 0x1e3a80 -[UIRuntimeConnection initWithCoder:] 11 UIFoundation 0x28890 UINibDecoderDecodeObjectForValue 12 UIFoundation 0x28a18 UINibDecoderDecodeObjectForValue 13 UIFoundation 0x28cac -[UINibDecoder decodeObjectForKey:] 14 UIKitCore 0x1e87dc -[NSCoder(UIIBDependencyInjectionInternal) _decodeObjectsWithSourceSegueTemplate:creator:sender:forKey:] 15 UIKitCore 0x1e2ea4 -[UINib instantiateWithOwner:options:] 16 UIKitCore 0x9f96c -[UIViewController loadView] 17 UIKitCore 0x75da8 -[UIViewController loadViewIfRequired] 18 UIKitCore 0x14430 -[UIViewController view] 19 UIKitCore 0x4237bc -[UINavigationController _preferredContentSizeForcingLoad:] 20 UIKitCore 0x116b15c -[_UISheetPresentationMetrics formSheetSizeForViewController:windowSize:screenSize:] 21 UIKitCore 0xb5c60c -[UIViewController _formSheetSizeForWindowWithSize:screenSize:] 22 UIKitCore 0x546ebc -[_UISheetLayoutInfo _preferredSize] 23 UIKitCore 0x18da60 -[_UISheetLayoutInfo _isEdgeAttached] 24 UIKitCore 0x19d428 -[_UISheetLayoutInfo _margins] 25 UIKitCore 0x19ce88 -[_UISheetLayoutInfo _stackAlignmentFrame] 26 UIKitCore 0x211018 -[_UISheetLayoutInfo _fullHeightUntransformedFrame] 27 UIKitCore 0x18f39c -[_UISheetLayoutInfo _untransformedFrame] 28 UIKitCore 0x188350 -[UISheetPresentationController _containerViewLayoutSubviews] 29 UIKitCore 0x18f1fc -[UITransitionView layoutSubviews] 30 UIKitCore 0x26070 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] 31 QuartzCore 0x14c14 CA::Layer::layout_if_needed(CA::Transaction*) 32 UIKitCore 0x16b78 -[UIView(Hierarchy) layoutBelowIfNeeded] 33 UIKitCore 0x186f4c -[UISheetPresentationController presentationTransitionWillBegin] 34 UIKitCore 0x3187b4 -[_UIFormSheetPresentationController presentationTransitionWillBegin] 35 UIKitCore 0x185dd0 __80-[UIPresentationController _initViewHierarchyForPresentationSuperview:inWindow:]_block_invoke 36 UIKitCore 0x1874f8 __77-[UIPresentationController runTransitionForCurrentStateAnimated:handoffData:]_block_invoke_3 37 UIKitCore 0x8584c -[_UIAfterCACommitBlock run] 38 UIKitCore 0x85784 -[_UIAfterCACommitQueue flush] 39 UIKitCore 0xa254 _runAfterCACommitDeferredBlocks 40 UIKitCore 0x9f74 _cleanUpAfterCAFlushAndRunDeferredBlocks 41 UIKitCore 0x9e84 _UIApplicationFlushCATransaction 42 UIKitCore 0x9e0c __setupUpdateSequence_block_invoke_2 43 UIKitCore 0x9404 _UIUpdateSequenceRun 44 UIKitCore 0x8ab4 schedulerStepScheduledMainSection 45 UIKitCore 0x41e4 runloopSourceCallback 46 CoreFoundation 0xfa8c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 47 CoreFoundation 0xf8a4 __CFRunLoopDoSource0 48 CoreFoundation 0xf700 __CFRunLoopDoSources0 49 CoreFoundation 0x10080 __CFRunLoopRun 50 CoreFoundation 0x11c3c CFRunLoopRunSpecific 51 GraphicsServices 0x1454 GSEventRunModal 52 UIKitCore 0x135274 -[UIApplication _run] 53 UIKitCore 0x100a28 UIApplicationMain 54 Saleslink DEV 0x1f9ea8 main + 17 (AppDelegate.swift:17) 55 ??? 0x1af61bf08 (Missing) Would love to know if anyone else has encountered this, or if there’s an official radar or feedback ID we can follow. Hoping this gets resolved before the GM release of Xcode 26. Thanks!

We have encountered an issue with the app where it fails to progress beyond the splash screen. Interestingly, the problem seems to resolve itself after either reinstalling the app or restarting the phone. This behavior is observed specifically in version 18.3.1. Could this issue be related to a network connection or initialization problem in this version? Any insights or recommendations would be appreciated. Thank you for your assistance!

Generic parameter 'V' could not be inferred ERROR

Has anyone come across the issue that setting GKLocalPlayer.local.authenticateHandler breaks a RealityView's world tracking on iOS / iPadOS 18 beta 5? I'm in the process of upgrading my app to make use of the much appreciated RealityView unification, using RealityView not only on visionOS but now also on iOS and iPadOS. In my RealityView, I enable world tracking on iOS like this: content.camera = .worldTracking However, device position and orientation were ignored (the camera remained static) and there was no camera pass-through. Then I discovered that the issue disappeared when I remove the line GKLocalPlayer.local.authenticateHandler = { viewController, error in // ... some more code ... } So I filed FB14731139 and hope that it will be resolved before the release of iOS / iPadOS 18.

Hi everyone, I've noticed a significant change in the visual behavior of List section headers between iOS 18 and iOS 26 beta that I'd like to clarify. Current Behavior: iOS 18 and earlier: Section headers with .listStyle(.plain) display with a translucent material background (regular material with blur effect) when pinned to the top during scrolling iOS 26 beta: Section headers with .listStyle(.plain) appear with a transparent/clear background even when pinned to the top Sample Code: struct ContentView: View { var body: some View { NavigationStack { List(1 ..< 5) { headerIndex in Section { ForEach(1...5, id: \.self) { rowIndex in HStack { Text("Row \(rowIndex)") .frame(height: 40) .padding(.horizontal) .background(Color.blue) Spacer() Image(systemName: "chevron.right") .foregroundStyle(.secondary) .font(.title3) } } } header: { Text("Header \(headerIndex)") .frame(height: 44) } .listRowSeparator(.hidden) } .listStyle(.plain) .clipped() } } } Questions: Is this change in header background behavior for .plain list style intentional in iOS 26? If so, what's the recommended way to maintain the previous material background appearance when headers are pinned? Should this be filed as feedback if it's unintended behavior? Testing Environment: Xcode 26.0 beta 3 (17A5276g) iOS 26 beta (23A5287g) vs iOS 18.5 Tested on simulator The translucent header background when pinned was quite useful for maintaining readability over scrolling content, so I'm hoping to understand if this is the new expected behavior or if there's a way to preserve the previous appearance. Any insights would be greatly appreciated! iOS 18.5 iOS 26 Beta

Experiencing 100% CPU usage in SwiftUI app using UIHostingController, only on iOS 26 beta and Xcode beta. Issue involves excessive view updates in AttributeGraph propagation. Stack trace (main thread): thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP frame #0: 0x00000001c38b9aa4 AttributeGraph`AG::Graph::propagate_dirty(AG::AttributeID) + 416 frame #1: 0x00000001d9a743ec SwiftUICore`SwiftUI.ObservationGraphMutation.apply() -> () + 656 frame #2: 0x00000001d97c0d4c SwiftUICore`function signature specialization <Arg[2] = [Closure Propagated : closure #1 () -> () in SwiftUI.(AsyncTransaction in _F9F204BD2F8DB167A76F17F3FB1B3335).apply() -> (), Argument Types : [SwiftUI.AsyncTransaction]> of generic specialization <()> of closure #1 () throws -> τ_0_0 in SwiftUI.withTransaction<τ_0_0>(SwiftUI.Transaction, () throws -> τ_0_0) throws -> τ_0_0 + 336 frame #3: 0x00000001d9a6ac80 SwiftUICore`merged function signature specialization <Arg[3] = Owned To Guaranteed> of function signature specialization <Arg[1] = [Closure Propagated : implicit closure #2 () -> () in implicit closure #1 @Sendable (SwiftUI.(AsyncTransaction in _F9F204BD2F8DB167A76F17F3FB1B3335)) -> () -> () in SwiftUI.GraphHost.flushTransactions() -> (), Argument Types : [SwiftUI.AsyncTransaction]> of SwiftUI.GraphHost.runTransaction(_: Swift.Optional<SwiftUI.Transaction>, do: () -> (), id: Swift.Optional<Swift.UInt32>) -> () + 196 frame #4: 0x00000001d9a52ab0 SwiftUICore`SwiftUI.GraphHost.flushTransactions() -> () + 176 frame #5: 0x00000001d8461aac SwiftUI`closure #1 (SwiftUI.GraphHost) -> () in SwiftUI._UIHostingView._renderForTest(interval: Swift.Double) -> () + 20 frame #6: 0x00000001d9bf3b38 SwiftUICore`partial apply forwarder for closure #1 (SwiftUI.ViewGraph) -> τ_1_0 in SwiftUI.ViewGraphRootValueUpdater.updateGraph<τ_0_0>(body: (SwiftUI.GraphHost) -> τ_1_0) -> τ_1_0 + 20 frame #7: 0x00000001d9e16dc4 SwiftUICore`SwiftUI.ViewGraphRootValueUpdater._updateViewGraph<τ_0_0>(body: (SwiftUI.ViewGraph) -> τ_1_0) -> Swift.Optional<τ_1_0> + 200 frame #8: 0x00000001d9e1546c SwiftUICore`SwiftUI.ViewGraphRootValueUpdater.updateGraph<τ_0_0>(body: (SwiftUI.GraphHost) -> τ_1_0) -> τ_1_0 + 136 frame #9: 0x00000001d8461a7c SwiftUI`closure #1 () -> () in closure #1 () -> () in closure #1 () -> () in SwiftUI._UIHostingView.beginTransaction() -> () + 144 frame #10: 0x00000001d846aed0 SwiftUI`partial apply forwarder for closure #1 () -> () in closure #1 () -> () in closure #1 () -> () in SwiftUI._UIHostingView.beginTransaction() -> () + 20 frame #11: 0x00000001d984f814 SwiftUICore`closure #1 () throws -> τ_0_0 in static SwiftUI.Update.ensure<τ_0_0>(() throws -> τ_0_0) throws -> τ_0_0 + 48 frame #12: 0x00000001d984e114 SwiftUICore`static SwiftUI.Update.ensure<τ_0_0>(() throws -> τ_0_0) throws -> τ_0_0 + 96 frame #13: 0x00000001d846aeac SwiftUI`partial apply forwarder for closure #1 () -> () in closure #1 () -> () in SwiftUI._UIHostingView.beginTransaction() -> () + 64 frame #14: 0x00000001851eab1c UIKitCore`___lldb_unnamed_symbol311742 + 20 * frame #15: 0x00000001852b56a8 UIKitCore`___lldb_unnamed_symbol315200 + 44 frame #16: 0x0000000185175120 UIKitCore`___lldb_unnamed_symbol308851 + 20 frame #17: 0x00000001d984e920 SwiftUICore`static SwiftUI.Update.dispatchImmediately<τ_0_0>(reason: Swift.Optional<SwiftUI.CustomEventTrace.ActionEventType.Reason>, _: () -> τ_0_0) -> τ_0_0 + 300 frame #18: 0x00000001d95a7428 SwiftUICore`static SwiftUI.ViewGraphHostUpdate.dispatchImmediately<τ_0_0>(() -> τ_0_0) -> τ_0_0 + 40 frame #19: 0x00000001852b59dc UIKitCore`___lldb_unnamed_symbol315204 + 192 frame #20: 0x00000001852b54a4 UIKitCore`___lldb_unnamed_symbol315199 + 64 frame #21: 0x0000000185745dd4 UIKitCore`_UIUpdateSequenceRunNext + 120 frame #22: 0x0000000186144fac UIKitCore`schedulerStepScheduledMainSectionContinue + 56 frame #23: 0x00000002505ad150 UpdateCycle`UC::DriverCore::continueProcessing() + 36 frame #24: 0x0000000180445b20 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 frame #25: 0x0000000180445a68 CoreFoundation`__CFRunLoopDoSource0 + 168 frame #26: 0x00000001804451f4 CoreFoundation`__CFRunLoopDoSources0 + 220 frame #27: 0x00000001804443a8 CoreFoundation`__CFRunLoopRun + 756 frame #28: 0x000000018043f458 CoreFoundation`_CFRunLoopRunSpecificWithOptions + 496 frame #29: 0x00000001928d19bc GraphicsServices`GSEventRunModal + 116 frame #30: 0x0000000186224480 UIKitCore`-[UIApplication _run] + 772 frame #31: 0x0000000186228650 UIKitCore`UIApplicationMain + 124 frame #32: 0x000000010bb1b504 MyApp.debug.dylib`main at main.swift:13:1 frame #33: 0x00000001043813d0 dyld_sim`start_sim + 20 frame #34: 0x000000010468ab98 dyld`start + 6076 Used let _ = Self.printChanges() in my SwiftUI View and got infinite changes of \_UICornerProvider.<computed 0x000000018527ffd8 (Optional<UICoordinateSpace>)> changed. Reproduces only on beta; works on stable iOS. Likely beta-specific bug in SwiftUI rendering.