Crash on opening Sequence Director for Level Sequence

Within the project attached, the Sequence Director can not be opened for the Level Sequence "SkateReel Sequencer Crash." The user reports being able to open the Sequence Director prior to copying and pasting Blueprint nodes (relating to the Widget) between events within the Sequence Director.

Project has been tested in 4.25.3(CL 13942748) and 4.26.0 Preview 2(CL 14419252), with the crash occurring in both versions.

1.  Open attached Project SkateReel Sequencer Crash
2.  Open Content > Sequencer > SkateReel Sequencer
3.  Right Click any Keyframe > Properties > Click Magnifying Glass

Result: Project will crash to Desktop with error message: 

Assertion failed: OwningNode [Link Removed] [Line: 474]

Expected: Sequence Director will open.

Assertion failed: OwningNode [Link Removed] [Line: 474]

ntdll!7a9f0000 + 9be14
KERNELBASE!78140000 + 226ee
UE4Editor-Core!ReportCrash(_EXCEPTION_POINTERS *) [WindowsPlatformCrashContext.cpp:1488]
UE4Editor!`GuardedMainWrapper'::`1'::filt$0 [LaunchWindows.cpp:140]
VCRUNTIME140!6f960000 + dfc0
ntdll!7a9f0000 + a10ef
ntdll!7a9f0000 + 4b474
ntdll!7a9f0000 + 4b1c5
KERNELBASE!78140000 + 23e49
UE4Editor-Core!ReportAssert(wchar_t const *,int) [WindowsPlatformCrashContext.cpp:1541]
UE4Editor-Core!FWindowsErrorOutputDevice::Serialize(wchar_t const *,ELogVerbosity::Type,FName const &) [WindowsErrorOutputDevice.cpp:78]
UE4Editor-Core!FOutputDevice::LogfImpl(wchar_t const *,...) [OutputDevice.cpp:61]
UE4Editor-Core!AssertFailedImplV [AssertionMacros.cpp:100]
UE4Editor-Core!FDebug::CheckVerifyFailedImpl(char const *,char const *,int,wchar_t const *,...) [AssertionMacros.cpp:450]
UE4Editor-Engine!UEdGraphPin::GetSchema() [EdGraphPin.cpp:644]
UE4Editor-GraphEditor!SGraphPin::Construct(SGraphPin::FArguments const &,UEdGraphPin *) [SGraphPin.cpp:159]
UE4Editor-GraphEditor!SGraphPinKey::Construct(SGraphPinKey::FArguments const &,UEdGraphPin *) [SGraphPinKey.cpp:36]
UE4Editor-GraphEditor!TDecl<SGraphPinKey,RequiredArgs::T1RequiredArgs<UEdGraphPin * &> >::operator<<= [DeclarativeSyntaxSupport.h:1122]
UE4Editor-GraphEditor!FNodeFactory::CreateK2PinWidget(UEdGraphPin *) [NodeFactory.cpp:340]
UE4Editor-GraphEditor!FNodeFactory::CreatePinWidget(UEdGraphPin *) [NodeFactory.cpp:237]
UE4Editor-GraphEditor!SGraphNode::CreatePinWidget(UEdGraphPin *) [SGraphNode.cpp:1177]
UE4Editor-GraphEditor!SGraphNode::CreateStandardPinWidget(UEdGraphPin *) [SGraphNode.cpp:1145]
UE4Editor-GraphEditor!SGraphNode::CreatePinWidgets() [SGraphNode.cpp:1155]
UE4Editor-GraphEditor!SGraphNode::UpdateGraphNode() [SGraphNode.cpp:987]
UE4Editor-GraphEditor!SGraphNodeK2Base::UpdateStandardNode() [SGraphNodeK2Base.cpp:39]
UE4Editor-GraphEditor!SGraphNodeK2Default::Construct(SGraphNodeK2Default::FArguments const &,UK2Node *) [SGraphNodeK2Default.cpp:15]
UE4Editor-GraphEditor!TDecl<SGraphNodeK2Default,RequiredArgs::T1RequiredArgs<UK2Node * &> >::operator<<= [DeclarativeSyntaxSupport.h:1122]
UE4Editor-GraphEditor!FNodeFactory::CreateNodeWidget(UEdGraphNode *) [NodeFactory.cpp:191]
UE4Editor-GraphEditor!SGraphPanel::AddNode(UEdGraphNode *,SGraphPanel::AddNodeBehavior) [SGraphPanel.cpp:1428]
UE4Editor-GraphEditor!SGraphPanel::Update() [SGraphPanel.cpp:1525]
UE4Editor-GraphEditor!SGraphEditorImpl::TriggerRefresh(double,float) [SGraphEditorImpl.cpp:495]
UE4Editor-GraphEditor!TBaseSPMethodDelegateInstance<0,SGraphEditorImpl,0,EActiveTimerReturnType >::Execute(double,float) [DelegateInstancesImpl.h:298]
UE4Editor-SlateCore!SWidget::ExecuteActiveTimers(double,float) [SWidget.cpp:1511]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1212]
UE4Editor-Slate!SBox::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SBox.cpp:293]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-Slate!SBorder::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SBorder.cpp:120]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SOverlay::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SOverlay.cpp:95]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-SlateCore!SPanel::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:12]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-Slate!SSplitter::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SSplitter.cpp:167]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-Slate!SSplitter::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SSplitter.cpp:167]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SOverlay::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SOverlay.cpp:95]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-SlateCore!SPanel::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:12]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-Slate!SBorder::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SBorder.cpp:120]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SOverlay::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SOverlay.cpp:95]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-SlateCore!SPanel::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:12]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-Slate!SSplitter::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SSplitter.cpp:167]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SOverlay::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SOverlay.cpp:95]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-SlateCore!SPanel::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:12]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SPanel::PaintArrangedChildren(FPaintArgs const &,FArrangedChildren const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:31]
UE4Editor-SlateCore!SPanel::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SPanel.cpp:12]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SOverlay::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SOverlay.cpp:95]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SCompoundWidget::OnPaint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SCompoundWidget.cpp:35]
UE4Editor-SlateCore!SWidget::Paint(FPaintArgs const &,FGeometry const &,FSlateRect const &,FSlateWindowElementList &,int,FWidgetStyle const &,bool) [SWidget.cpp:1326]
UE4Editor-SlateCore!SWindow::PaintSlowPath(FSlateInvalidationContext const &) [SWindow.cpp:2048]
UE4Editor-SlateCore!FSlateInvalidationRoot::PaintInvalidationRoot(FSlateInvalidationContext const &) [SlateInvalidationRoot.cpp:218]
UE4Editor-SlateCore!SWindow::PaintWindow(double,float,FSlateWindowElementList &,FWidgetStyle const &,bool) [SWindow.cpp:2080]
UE4Editor-Slate!FSlateApplication::DrawWindowAndChildren(TSharedRef<SWindow,0> const &,FDrawWindowArgs &) [SlateApplication.cpp:1012]
UE4Editor-Slate!FSlateApplication::DrawWindowAndChildren(TSharedRef<SWindow,0> const &,FDrawWindowArgs &) [SlateApplication.cpp:1064]
UE4Editor-Slate!FSlateApplication::PrivateDrawWindows(TSharedPtr<SWindow,0>) [SlateApplication.cpp:1242]
UE4Editor-Slate!FSlateApplication::TickApplication(ESlateTickType,float) [SlateApplication.cpp:1496]
UE4Editor-Slate!FSlateApplication::Tick(ESlateTickType) [SlateApplication.cpp:1358]
UE4Editor!FEngineLoop::Tick() [LaunchEngineLoop.cpp:4940]
UE4Editor!GuardedMain(wchar_t const *) [Launch.cpp:169]
UE4Editor!GuardedMainWrapper(wchar_t const *) [LaunchWindows.cpp:137]

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