Project crashes when exiting mobile preview

User project crashes when exiting from mobile preview.

Frequency: 5/5

Crashreporter: [Link Removed]

1. Unzip and open project at attached link:

[Link Removed]

2. Press Play>Mobile Preview
3. Exit Mobile Preview

MachineId:4E82586D46B558EA69EF0EAA821297B1
EpicAccountId:1558531203f84e81b70959b8a59badef

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

UE4Editor_Engine!UPrimitiveComponent::UnWeldFromParent() + 982 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\primitivecomponentphysics.cpp:749]
UE4Editor_Engine!UPrimitiveComponent::UnWeldChildren() + 185 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\primitivecomponentphysics.cpp:759]
UE4Editor_Engine!UPrimitiveComponent::DestroyPhysicsState() + 34 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\primitivecomponent.cpp:477]
UE4Editor_Engine!UActorComponent::ExecuteUnregisterEvents() + 109 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:968]
UE4Editor_Engine!UActorComponent::UnregisterComponent() + 404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actorcomponent.cpp:809]
UE4Editor_Engine!AActor::UnregisterAllComponents() + 253 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\actor.cpp:3191]
UE4Editor_Engine!ULevel::ClearLevelComponents() + 284 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\level.cpp:584]
UE4Editor_Engine!UWorld::ClearWorldComponents() + 149 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\world.cpp:1145]
UE4Editor_Engine!UWorld::CleanupWorld() + 532 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\engine\private\world.cpp:2998]
UE4Editor_UnrealEd!UEditorEngine::TeardownPlaySession() + 3416 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\playlevel.cpp:507]
UE4Editor_UnrealEd!UEditorEngine::EndPlayMap() + 2396 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\playlevel.cpp:182]
UE4Editor_UnrealEd!UEditorEngine::Tick() + 804 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\editor.cpp:966]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\unrealedengine.cpp:347]
UE4Editor!FEngineLoop::Tick() + 4179 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2257]
UE4Editor!GuardedMain() + 1404 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

Error and terrain