Our app is being killed by the watchdog on iPadOS 26 (iPad Pro 11, 3rd gen) when navigating between tabs after using search. The crash only occurs when AssistiveTouch is enabled — disabling it prevents the issue entirely.
The crash stack shows the main thread blocked in CoreUI vector glyph rasterization (CUINamedVectorGlyph _layerNamesForRenderingMode:inRendition:) triggered during a UINavigationController transition while the keyboard is being dismissed:
UINavigationController _startCustomTransition → UIKeyboardSceneDelegate _restoreInputViewsWithId → UITextField resignFirstResponder → SwiftUI ViewGraphRootValueUpdater.render → UIButton layoutSubviews → UIImageView _setImage → CUINamedVectorGlyph _layerNamesForRenderingMode:inRendition:
The termination reason:
FRONTBOARD domain:10 code:0x8BADF00D "Failed to terminate gracefully after 5.0s" WatchdogEvent: process-exit WatchdogVisibility: Foreground
Key observations:
- Only reproduces with AssistiveTouch enabled
- iPad Pro 11 (3rd gen), iPadOS 26
- Our code is not on the crashing thread — it's entirely UIKit/CoreUI/SwiftUI framework code
- Similar to issues reported in thread/808808 (https://developer.apple.com/forums/thread/808808) and dotnet/maui#32365 (https://github.com/dotnet/maui/issues/32365)
Is this a known issue with AssistiveTouch + UINavigationController transitions on iPadOS 26? Is there a recommended workaround?