We are seeing this error specifically on iPad. But we are not able to reproduce it. From time to time this happens on users' iPad devices but it does happen randomly. Please checkout the crash log obtained by Firebase Crashlytics. Any help would be appreciated. For layout, we are using SnapKit. Crashed: com.apple.main-thread 0 libobjc.A.dylib 0x1785 objc_msgSend + 5 1 QuartzCore 0x16c19d CA::Layer::layout_if_needed(CA::Transaction*) + 575 2 QuartzCore 0x165a64 -[CALayer layoutIfNeeded] + 362 3 UIKitCore 0x4e23a0 __86-[UIViewController window:willAnimateRotationToInterfaceOrientation:duration:newSize:]_block_invoke + 52 4 UIKitCore 0x114d776 +[UIView _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 573 5 UIKitCore 0x114dc51 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 87 6 UIKitCore 0x4e231c -[UIViewController window:willAnimateRotationToInterfaceOrientation:duration:newSize:] + 320 7 UIKitCore 0x4ea05e __104-[UIViewController(AdaptiveSizing_Internal) _window:viewWillTransitionToSize:withTransitionCoordinator:]_block_invoke.3266 + 54 8 UIKitCore 0x4f31f6 -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] + 294 9 UIKitCore 0x4ef6b1 -[_UIViewControllerTransitionContext __runAlongsideAnimations] + 263 10 UIKitCore 0x114d776 +[UIView _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 573 11 UIKitCore 0x114dc51 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 87 12 UIKitCore 0x50db15 __58-[_UIWindowRotationAnimationController animateTransition:]_block_invoke_2 + 277 13 UIKitCore 0x11515a0 +[UIView _performBlockDelayingTriggeringResponderEvents:forScene:] + 207 14 UIKitCore 0x50d8a0 __58-[_UIWindowRotationAnimationController animateTransition:]_block_invoke + 158 15 UIKitCore 0x114d776 +[UIView _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 573 16 UIKitCore 0x114dc51 +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] + 87 17 UIKitCore 0x50d77e -[_UIWindowRotationAnimationController animateTransition:] + 491 18 UIKitCore 0xc3f43e -[UIWindow _rotateToBounds:withAnimator:transitionContext:] + 525 19 UIKitCore 0xc42131 -[UIWindow _rotateWindowToOrientation:updateStatusBar:duration:skipCallbacks:] + 2330 20 UIKitCore 0xc42712 -[UIWindow _setRotatableClient:toOrientation:updateStatusBar:duration:force:isRotating:] + 615 21 UIKitCore 0xc416c3 -[UIWindow _setRotatableViewOrientation:updateStatusBar:duration:force:] + 99 22 UIKitCore 0xc405b6 __57-[UIWindow _updateToInterfaceOrientation:duration:force:]_block_invoke + 218 23 UIKitCore 0xc403d8 -[UIWindow _updateToInterfaceOrientation:duration:force:] + 1447 24 CoreFoundation 0x52f12 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 25 CoreFoundation 0x52ee1 ___CFXRegistrationPost_block_invoke + 49 26 CoreFoundation 0x525ff _CFXRegistrationPost + 454 27 CoreFoundation 0x51f6d _CFXNotificationPost + 796 28 Foundation 0xc998a -[NSNotificationCenter postNotificationName:object:userInfo:] + 59 29 UIKitCore 0x7d31ea -[UIDevice setOrientation:animated:] + 281 30 UIKitCore 0x22a516 __134-[_UIWindowSceneDeviceOrientationSettingsDiffAction _updateDeviceOrientationWithSettingObserverContext:windowScene:transitionContext:]_block_invoke + 137 31 UIKitCore 0x6bc613 +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:actions:completion:] + 871 32 UIKitCore 0x7cf5c6 _UISceneSettingsDiffActionPerformChangesWithTransitionContext + 240 33 UIKitCore 0x22a45b -[_UIWindowSceneDeviceOrientationSettingsDiffAction _updateDeviceOrientationWithSettingObserverContext:windowScene:transitionContext:] + 248 34 UIKitCore 0x22a2d8 -[_UIWindowSceneDeviceOrientationSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] + 233 35 UIKitCore 0x4f75f __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke + 797 36 UIKitCore 0x4e209 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 253 37 UIKitCore 0x4f398 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 208 38 UIKitCore 0x6e4e8b -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 502 39 FrontBoardServices 0x88c7 -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:] + 530 40 FrontBoardServices 0x32149 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2 + 133 41 FrontBoardServices 0x15ad5 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 209 42 FrontBoardServices 0x32091 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke + 372 43 libdispatch.dylib 0x3508 _dispatch_client_callout + 8 44 libdispatch.dylib 0x6052 _dispatch_block_invoke_direct + 281 45 FrontBoardServices 0x567a5 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30 46 FrontBoardServices 0x5648b -[FBSSerialQueue _targetQueue_performNextIfPossible] + 433 47 FrontBoardServices 0x56950 -[FBSSerialQueue _performNextFromRunLoopSource] + 22 48 CoreFoundation 0x8038a __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 49 CoreFoundation 0x80282 __CFRunLoopDoSource0 + 180 50 CoreFoundation 0x7f764 __CFRunLoopDoSources0 + 248 51 CoreFoundation 0x79f2f __CFRunLoopRun + 878 52 CoreFoundation 0x796d6 CFRunLoopRunSpecific + 567 53 GraphicsServices 0x3db3 GSEventRunModal + 139 54 UIKitCore 0xbf7cf7 -[UIApplication _run] + 912 55 UIKitCore 0xbfcba8 UIApplicationMain + 101 56 edX 0x487f88 main + 15 (main.m:15) 57 libdyld.dylib 0x13e9 start + 1