Fatal Exception: NSInternalInconsistencyException Unexpected view controller change in Supplementary column for expanding <xxxx.CustomSplitViewController: 0x1051073b0> Fatal Exception: NSInternalInconsistencyException 0 CoreFoundation 0x9904c __exceptionPreprocess 1 libobjc.A.dylib 0x15f54 objc_exception_throw 2 Foundation 0x1306cc _userInfoForFileAndLine 3 UIKitCore 0x991928 -[UISplitViewControllerPanelImpl panelController:separateSupplementaryViewControllerFromPrimaryViewController:] 4 UIKitCore 0x96699c __54-[UIPanelController _expandWithTransitionCoordinator:]_block_invoke_4 5 UIKitCore 0xb0d78 +[UIPanelController _withDisabledAppearanceTransitions:forVisibleDescendantsOf:perform:] 6 UIKitCore 0xb0940 -[UIPanelController _withDisabledAppearanceTransitionsPerform:] 7 UIKitCore 0x9668c0 __54-[UIPanelController _expandWithTransitionCoordinator:]_block_invoke_3 8 UIKitCore 0x1c6a08 +[UIViewController _performWithoutDeferringTransitionsAllowingAnimation:actions:] 9 UIKitCore 0x966814 __54-[UIPanelController _expandWithTransitionCoordinator:]_block_invoke_2 10 UIKitCore 0x174268 +[UIView(Animation) performWithoutAnimation:] 11 UIKitCore 0x966760 __54-[UIPanelController _expandWithTransitionCoordinator:]_block_invoke 12 UIKitCore 0x26fc28 -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] 13 UIKitCore 0x529ae8 -[_UIViewControllerTransitionContext __runAlongsideAnimations] 14 UIKitCore 0x4f49ac -[_UIWindowAnimationController animateTransition:] 15 UIKitCore 0xb70dc -[UIWindow _adjustSizeClassesAndResizeWindowToFrame:] 16 UIKitCore 0x23e408 -[UIWindow _resizeWindowFrameToSceneBoundsIfNecessary] 17 UIKitCore 0x461bd8 -[UIWindow _sceneBoundsDidChange] 18 UIKitCore 0x5802e8 -[_UIScenefbsSceneBasedMetricsCalculator _updateMetricsOnWindows:animated:] 19 UIKitCore 0x2b9fcc -[UIWindowScene _computeMetricsForWindows:animated:] 20 UIKitCore 0x2e98a8 -[UIWindowScene _computeMetrics:] 21 UIKitCore 0x270350 +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:actions:completion:] 22 UIKitCore 0x1b2340 _UISceneSettingsDiffActionPerformChangesWithTransitionContext 23 UIKitCore 0x5c740c -[_UIWindowSceneGeometrySettingsDiffAction _updateSceneGeometryWithSettingObserverContext:windowScene:transitionContext:] 24 UIKitCore 0x5e535c -[_UIWindowSceneGeometrySettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] 25 UIKitCore 0x724260 __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke.608 26 UIKitCore 0x1e0c60 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] 27 UIKitCore 0x224524 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] 28 UIKitCore 0x1ae370 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] 29 FrontBoardServices 0xd100 -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:] 30 FrontBoardServices 0x25d4c __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2 31 FrontBoardServices 0xa6b4 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] 32 FrontBoardServices 0x10b10 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke 33 libdispatch.dylib 0x4660 _dispatch_client_callout 34 libdispatch.dylib 0x8118 _dispatch_block_invoke_direct 35 FrontBoardServices 0xbf94 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ 36 FrontBoardServices 0xb3d4 -[FBSSerialQueue _targetQueue_performNextIfPossible] 37 FrontBoardServices 0xf9e4 -[FBSSerialQueue _performNextFromRunLoopSource] 38 CoreFoundation 0xbb020 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 39 CoreFoundation 0xcbce0 __CFRunLoopDoSource0 40 CoreFoundation 0x5fe8 __CFRunLoopDoSources0 41 CoreFoundation 0xb7f4 __CFRunLoopRun 42 CoreFoundation 0x1f3b8 CFRunLoopRunSpecific 43 GraphicsServices 0x138c GSEventRunModal 44 UIKitCore 0x5196a8 -[UIApplication _run] 45 UIKitCore 0x2987f4 UIApplicationMain 46 route 0x6f2c main + 19 (main.m:19) 47 ??? 0x102765a24 (Missing)