Engine Crashes When SubAnimInstance is set up and Master Sequence is Set to Spawnable

LoginId:bdcd2df1437ec38ad0d19c85e30ff2d1
EpicAccountId:1ed52ca976af4368b6c30d11b7cdc18f

Access violation - code c0000005 (first/second chance not available)

UE4Editor_Engine!UAnimInstance::RecalcRequiredBones() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\animation\animinstance.cpp:960]
UE4Editor_Engine!USkeletalMeshComponent::RecalcRequiredBones() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:1533]
UE4Editor_Engine!USkeletalMeshComponent::InitAnim() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:601]
UE4Editor_Engine!USkeletalMeshComponent::OnRegister() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\components\skeletalmeshcomponent.cpp:475]
UE4Editor_Engine!UActorComponent::ExecuteRegisterEvents() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\components\actorcomponent.cpp:1236]
UE4Editor_Engine!UActorComponent::RegisterComponentWithWorld() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\components\actorcomponent.cpp:974]
UE4Editor_Engine!AActor::IncrementalRegisterComponents() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\actor.cpp:4125]
UE4Editor_Engine!AActor::RegisterAllComponents() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\engine\private\actor.cpp:4024]
UE4Editor_LevelSequence!FLevelSequenceActorSpawner::SpawnObject() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\levelsequence\private\levelsequenceactorspawner.cpp:89]
UE4Editor_LevelSequence!FLevelSequenceSpawnRegister::SpawnObject() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\levelsequence\private\levelsequencespawnregister.cpp:36]
UE4Editor_LevelSequenceEditor!FLevelSequenceEditorSpawnRegister::SpawnObject() [d:\build\++ue4+release-4.17+compile\sync\engine\plugins\moviescene\levelsequenceeditor\source\levelsequenceeditor\private\misc\levelsequenceeditorspawnregister.cpp:71]
UE4Editor_MovieScene!FMovieSceneSpawnRegister::SpawnObject() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\moviescene\private\moviescenespawnregister.cpp:30]
UE4Editor_MovieSceneTracks!FSpawnObjectToken::Execute() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\moviescenetracks\private\evaluation\moviescenespawntemplate.cpp:77]
UE4Editor_MovieScene!FMovieSceneExecutionTokens::Apply() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\moviescene\private\evaluation\moviesceneexecutiontokens.cpp:53]
UE4Editor_MovieScene!FMovieSceneRootEvaluationTemplateInstance::EvaluateGroup() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\moviescene\private\evaluation\moviesceneevaluationtemplateinstance.cpp:269]
UE4Editor_MovieScene!FMovieSceneRootEvaluationTemplateInstance::Evaluate() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\moviescene\private\evaluation\moviesceneevaluationtemplateinstance.cpp:254]
UE4Editor_Sequencer!FSequencer::EvaluateInternal() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\sequencer\private\sequencer.cpp:1719]
UE4Editor_Sequencer!FSequencer::NotifyMovieSceneDataChanged() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\sequencer\private\sequencer.cpp:1019]
UE4Editor_MovieSceneTools!SBoolCurveKeyEditor::OnCheckStateChanged() [d:\build\++ue4+release-4.17+compile\sync\engine\source\editor\moviescenetools\private\curvekeyeditors\sboolcurvekeyeditor.cpp:89]
UE4Editor_MovieSceneTools!TBaseSPMethodDelegateInstance<0,SBoolCurveKeyEditor,0,TTypeWrapper<void> __cdecl(enum ECheckBoxState)>::Execute() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:327]
UE4Editor_MovieSceneTools!TBaseSPMethodDelegateInstance<0,SBoolCurveKeyEditor,0,void __cdecl(enum ECheckBoxState)>::ExecuteIfSafe() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:434]
UE4Editor_Slate!SCheckBox::ToggleCheckedState() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:299]
UE4Editor_Slate!SCheckBox::OnMouseButtonUp() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\widgets\input\scheckbox.cpp:190]
UE4Editor_Slate!<lambda_1002768c627006711ef2f351a87ec0e7>::operator()() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5199]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_1002768c627006711ef2f351a87ec0e7> >() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:232]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5188]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5690]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5670]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1718]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:2161]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:881]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:721]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:1009]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3151]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.17+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll