Hi,

I have been having this stack trace related with undo manager. It is very 
particular to one single tester.

Is anyone having similar problems?

Thread 0 name:
Thread 0 Crashed:
0   libobjc.A.dylib                     0x000000019d454820 objc_msgSend + 32
1   Foundation                          0x00000001a4773410 -[_NSUndoStack 
popAndInvoke] + 116 (NSUndoManager.m:1714)
2   Foundation                          0x00000001a47717c4 -[NSUndoManager 
__redoCommonDoSingle:] + 184 (NSUndoManager.m:771)
3   UIKit                               0x000000023ba23c50 
-[NSUndoManagerAccessibility__UIKit__Foundation redo] + 76 
(NSUndoManagerAccessibility.m:38)
4   UIKitCore                           0x00000001a7ff1aac 
-[UIUndoGestureInteraction redo:] + 44 (UIUndoGestureInteraction.m:1536)
5   UIKitCore                           0x00000001a7ff13a4 
-[UIUndoGestureInteraction performActionWithDirection:] + 104 
(UIUndoGestureInteraction.m:0)
6   UIKitCore                           0x00000001a7ff10bc 
-[UIUndoGestureInteraction _endPanWithDirection:] + 40 
(UIUndoGestureInteraction.m:1346)
7   UIKitCore                           0x00000001a7ff150c 
-[UIUndoGestureInteraction performGestureWithDirection:authenticationMessage:] 
+ 120 (UIUndoGestureInteraction.m:1447)
8   UIKitCore                           0x00000001a78016dc 
-[_UIProductivityGestureAction _handleActionForWindowScene:] + 268 
(UIProductivityGestureAction.m:56)
9   UIKitCore                           0x00000001a7655344 -[UIApplication 
_handleNonLaunchSpecificActions:forScene:withTransitionContext:completion:] + 
3416 (UIApplication.m:11401)
10  UIKitCore                           0x00000001a73ea788 -[UIScene 
_emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 420 
(UIScene.m:1742)
11  UIKitCore                           0x00000001a73ea52c -[UIScene 
scene:didUpdateWithDiff:transitionContext:completion:] + 244 (UIScene.m:2012)
12  UIKitCore                           0x00000001a73ea36c 
-[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 336 
(UIApplicationSceneClientAgent.m:86)
13  FrontBoardServices                  0x00000001bd55641c -[FBSScene 
updater:didReceiveActions:forExtension:] + 1160 (FBSScene.m:904)
14  FrontBoardServices                  0x00000001bd53c19c -[FBSWorkspace 
_calloutQueue_executeCalloutFromSource:withBlock:] + 168 (FBSWorkspace.m:411)
15  FrontBoardServices                  0x00000001bd576cc4 
__71-[FBSWorkspaceScenesClient 
sceneID:sendActions:toExtension:completion:]_block_invoke + 220 
(FBSWorkspaceScenesClient.m:563)
16  libdispatch.dylib                   0x00000001ad082300 
_dispatch_client_callout + 20 (object.m:561)
17  libdispatch.dylib                   0x00000001ad085d48 
_dispatch_block_invoke_direct + 284 (queue.c:496)
18  FrontBoardServices                  0x00000001bd538520 
__FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 52 (FBSSerialQueue.m:285)
19  FrontBoardServices                  0x00000001bd5384a0 
-[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible] + 240 
(FBSSerialQueue.m:309)
20  FrontBoardServices                  0x00000001bd538378 
-[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource] + 28 
(FBSSerialQueue.m:322)
21  CoreFoundation                      0x00000001a50bd0ac 
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 
(CFRunLoop.c:1957)
22  CoreFoundation                      0x00000001a50bc328 __CFRunLoopDoSource0 
+ 176 (CFRunLoop.c:2001)
23  CoreFoundation                      0x00000001a50bab3c 
__CFRunLoopDoSources0 + 340 (CFRunLoop.c:2046)
24  CoreFoundation                      0x00000001a50b9818 __CFRunLoopRun + 828 
(CFRunLoop.c:2955)
25  CoreFoundation                      0x00000001a50b93f8 CFRunLoopRunSpecific 
+ 608 (CFRunLoop.c:3420)
26  GraphicsServices                    0x00000001e86474f8 GSEventRunModal + 
164 (GSEvent.c:2196)
27  UIKitCore                           0x00000001a74df8a0 -[UIApplication 
_run] + 888 (UIApplication.m:3685)
28  UIKitCore                           0x00000001a74deedc UIApplicationMain + 
340 (UIApplication.m:5270)
29  BAM                                 0x000000010462a660 qt_main_wrapper + 820
30  dyld                                0x00000001c7e0edcc start + 2240 
(dyldMain.cpp:1269)
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