AI in sublevel calling actors in persistent level crash editor when sublevel is not visible

If an AI is moving between points in the persistent level but is located within a sublevel and the sublevel is set to not visible, there is a chance that the editor will eventually crash. Setting IsValid checks does not stop the crash from occurring.

Frequency: 2/2

1. Download, unzip, open attached project
2. Press PIE
3. Wait for ~5-10 minutes

Results

After ~5-10 minutes, editor crashes.

Expected

AI continues to switch between two points in persistent level

MachineId:409D523543AE785961A2788C698A2F90
EpicAccountId:1558531203f84e81b70959b8a59badef

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

UE4Editor_AIModule!AAIController::ResumeMove() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\aimodule\private\aicontroller.cpp:713]
UE4Editor_AIModule!UAITask_MoveTo::Resume() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\aimodule\private\tasks\aitask_moveto.cpp:162]
UE4Editor_GameplayTasks!UGameplayTask::ActivateInTaskQueue() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\gameplaytasks\private\gameplaytask.cpp:313]
UE4Editor_GameplayTasks!UGameplayTasksComponent::UpdateTaskActivations() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\gameplaytasks\private\gameplaytaskscomponent.cpp:433]
UE4Editor_GameplayTasks!UGameplayTasksComponent::ProcessTaskEvents() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\gameplaytasks\private\gameplaytaskscomponent.cpp:311]
UE4Editor_GameplayTasks!UGameplayTasksComponent::AddTaskReadyForActivation() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\gameplaytasks\private\gameplaytaskscomponent.cpp:263]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:5077]
UE4Editor_CoreUObject!UObject::CallFunction() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:641]
UE4Editor_CoreUObject!UObject::ProcessContextOpcode() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:2060]
UE4Editor_CoreUObject!UObject::ProcessInternal() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:866]
UE4Editor_CoreUObject!UFunction::Invoke() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:5077]
UE4Editor_CoreUObject!UObject::ProcessEvent() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\coreuobject\private\uobject\scriptcore.cpp:1245]
UE4Editor_Engine!AActor::ProcessEvent() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\actor.cpp:639]
UE4Editor_Engine!FLatentActionManager::TickLatentActionForObject() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\latentactionmanager.cpp:174]
UE4Editor_Engine!FLatentActionManager::ProcessLatentActions() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\latentactionmanager.cpp:82]
UE4Editor_Engine!AActor::Tick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\actor.cpp:829]
UE4Editor_Engine!AActor::TickActor() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\actor.cpp:814]
UE4Editor_Engine!FActorTickFunction::ExecuteTick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\actor.cpp:111]
UE4Editor_Engine!FTickFunctionTask::DoTask() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:262]
UE4Editor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:999]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:932]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:679]
UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1776]
UE4Editor_Engine!FTickTaskSequencer::ReleaseTickGroup() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:530]
UE4Editor_Engine!FTickTaskManager::RunTickGroup() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:1432]
UE4Editor_Engine!UWorld::RunTickGroup() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:704]
UE4Editor_Engine!UWorld::Tick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:1197]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1349]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:368]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2775]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\launch.cpp:148]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build\++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll