UE4Editor_UnrealEd!UEditorEngine::PlayEditorSound() [editorengine.cpp:1887] UE4Editor_UnrealEd!FLauncherNotificationTask::DoTask() [playlevel.cpp:1265] UE4Editor_UnrealEd!TGraphTask<FLauncherNotificationTask>::ExecuteTask() [taskgraphinterfaces.h:753] UE4Editor_Core!FTaskThread::ProcessTasks() [taskgraph.cpp:430] UE4Editor_Core!FTaskThread::ProcessTasksUntilQuit() [taskgraph.cpp:273] UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() [taskgraph.cpp:991] UE4Editor_Core!FTaskGraphInterface::WaitUntilTaskCompletes() [taskgraphinterfaces.h:192] UE4Editor_Core!DirectStatsCommand() [statscommand.cpp:1485] UE4Editor_Core!FThreadStats::StopThread() [stats2.cpp:1137] UE4Editor!FEngineLoop::Exit() [launchengineloop.cpp:2159] UE4Editor!GuardedMain() [launch.cpp:153] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126] UE4Editor!WinMain() [launchwindows.cpp:200]
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-17688 in the post.