UE4Editor_Engine!USkeleton::GetSmartNameContainer() [skeleton.cpp:1410] UE4Editor_Engine!UAnimInstance::UpdateCurves() [animinstance.cpp:1137] UE4Editor_Engine!USkeletalMeshComponent::PostAnimEvaluation() [skeletalmeshcomponent.cpp:1851] UE4Editor_Engine!USkeletalMeshComponent::RefreshBoneTransforms() [skeletalmeshcomponent.cpp:1761] UE4Editor_UnrealEd!UDebugSkelMeshComponent::RefreshBoneTransforms() [debugskelmeshcomponent.cpp:480] UE4Editor_Engine!USkinnedMeshComponent::TickComponent() [skinnedmeshcomponent.cpp:669] UE4Editor_Engine!USkeletalMeshComponent::TickComponent() [skeletalmeshcomponent.cpp:1026] UE4Editor_UnrealEd!UDebugSkelMeshComponent::TickComponent() [debugskelmeshcomponent.cpp:802] UE4Editor_Engine!FActorComponentTickFunction::ExecuteTickHelper<<lambda_00d9c935eb8c907965991feb76bc5b0f> >() [actor.h:3055] UE4Editor_Engine!FActorComponentTickFunction::ExecuteTick() [actorcomponent.cpp:763] UE4Editor_Engine!FTickFunctionTask::DoTask() [ticktaskmanager.cpp:269] UE4Editor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() [taskgraphinterfaces.h:883] UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [taskgraph.cpp:954] UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [taskgraph.cpp:701] UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() [taskgraph.cpp:1798] UE4Editor_Engine!FTickTaskSequencer::ReleaseTickGroup() [ticktaskmanager.cpp:538] UE4Editor_Engine!FTickTaskManager::RunTickGroup() [ticktaskmanager.cpp:1450] UE4Editor_Engine!UWorld::RunTickGroup() [leveltick.cpp:758] UE4Editor_Engine!UWorld::Tick() [leveltick.cpp:1373] UE4Editor_Persona!FAnimationViewportClient::Tick() [animationeditorviewportclient.cpp:444] UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1698] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:391] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3036] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:264] kernel32!<Unknown> ntdll!<Unknown>
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-41380 in the post.