Crash while unhiding streaming level in multiplayer

When unhiding a streaming level several times on the client there can be a crash.

1. Download attached project
2. Open the project provided
3. Play in editor (with the number of players set to 2)
4. Let the project run for around 3 minutes

Result: The project will crash
Expected: The project would continue to hide and unhide the streaming level

UE4Editor_Engine!ULevel::SortActorList() level.cpp:438
UE4Editor_Engine!UWorld::AddToWorld() world.cpp:2157
UE4Editor_Engine!UWorld::UpdateLevelStreamingInner() world.cpp:2839
UE4Editor_Engine!UWorld::UpdateLevelStreaming() world.cpp:2905
UE4Editor_Engine!UGameViewportClient::Draw() gameviewportclient.cpp:1233
UE4Editor_Engine!FViewport::Draw() unrealclient.cpp:1412
UE4Editor_UnrealEd!UEditorEngine::Tick() editorengine.cpp:1896
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() unrealedengine.cpp:401
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3339
UE4Editor!GuardedMain() launch.cpp:166
UE4Editor!GuardedMainWrapper() launchwindows.cpp:144
UE4Editor!WinMain() launchwindows.cpp:223
UE4Editor!__scrt_common_main_seh() exe_common.inl:253
kernel32!<Unknown>
ntdll!<Unknown>