We're seeing the same thing in a SwiftUI portion of our app. It seems this started showing up with iOS 18.1.0. Unfortunately, we haven't been able to reproduce it. 0 CoreFoundation 0x827cc __exceptionPreprocess 1 libobjc.A.dylib 0x172e4 objc_exception_throw 2 Foundation 0x80f8d8 _userInfoForFileAndLine 3 UIKitCore 0xa617e8 -[UIPopoverPresentationController _sendDelegateWillRepositionToRect] 4 UIKitCore 0xa61fd0 -[UIPopoverPresentationController containerViewWillLayoutSubviews] 5 UIKitCore 0xd414 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] 6 QuartzCore 0x78c28 CA::Layer::layout_if_needed(CA::Transaction*) 7 UIKitCore 0x50138 -[UIView(Hierarchy) layoutBelowIfNeeded] 8 SwiftUI 0xc799f4 specialized PopoverPresentationDelegate.updateAnchor(_:presentationController:) 9 SwiftUI 0xc72b08 closure #1 in UIKitInspectorV3Bridge.updateAnchor() 10 SwiftUICore 0x1f1308 partial apply for thunk for @escaping @callee_guaranteed () -> () 11 SwiftUICore 0x4a5d3c static Update.dispatchActions() 12 SwiftUICore 0x4a520c static Update.end() 13 SwiftUICore 0x4a5fd8 closure #1 in static Update.ensure<A>(_:) 14 SwiftUICore 0x4a4dd4 static Update.ensure<A>(_:) 15 SwiftUI 0xc75790 UIKitInspectorV3Bridge.popoverSource(for:) 16 SwiftUI 0xc7a84c specialized PopoverPresentationDelegate.popoverPresentationController(_:willRepositionPopoverTo:in:) 17 SwiftUI 0xc75af0 @objc PopoverPresentationDelegate.popoverPresentationController(_:willRepositionPopoverTo:in:) 18 UIKitCore 0xa6185c -[UIPopoverPresentationController _sendDelegateWillRepositionToRect] 19 UIKitCore 0xa61b10 __86-[UIPopoverPresentationController viewWillTransitionToSize:withTransitionCoordinator:]_block_invoke 20 UIKitCore 0xb1c3ac __UIVIEWCONTROLLERTRANSITIONCOORDINATOR_IS_EXECUTING_ALONGSIDE_ANIMATION_BLOCK__ 21 UIKitCore 0x2e3648 -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] 22 UIKitCore 0x2e33d0 -[_UIViewControllerTransitionContext _runAlongsideCompletions] 23 UIKitCore 0x2e31a0 -[_UIViewControllerTransitionContext completeTransition:] 24 UIKitCore 0x1762b8 __58-[_UIWindowRotationAnimationController animateTransition:]_block_invoke_5 25 UIKitCore 0x175b78 +[UIView _performBlockDelayingTriggeringResponderEvents:forScene:] 26 UIKitCore 0x2e40f8 __58-[_UIWindowRotationAnimationController animateTransition:]_block_invoke_4 27 UIKitCore 0x7bfb0 __UIVIEW_IS_EXECUTING_ANIMATION_COMPLETION_BLOCK__ 28 UIKitCore 0x12ab88 -[UIViewAnimationBlockDelegate _sendDeferredCompletion:] 29 libdispatch.dylib 0x2370 _dispatch_call_block_and_release 30 libdispatch.dylib 0x40d0 _dispatch_client_callout 31 libdispatch.dylib 0x129e0 _dispatch_main_queue_drain 32 libdispatch.dylib 0x125fc _dispatch_main_queue_callback_4CF 33 CoreFoundation 0x56204 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ 34 CoreFoundation 0x53440 __CFRunLoopRun 35 CoreFoundation 0x52830 CFRunLoopRunSpecific 36 GraphicsServices 0x11c4 GSEventRunModal 37 UIKitCore 0x3d2eb0 -[UIApplication _run] 38 UIKitCore 0x4815b4 UIApplicationMain 39 Takedown 0x18cbac main + 43 (tWrestlingAppDelegate.swift:43) 40 ??? 0x1abda6ec8 (Missing)