The problem here is that the engine is not detecting a crash, rather becoming unresponsive. I think it has something to do with other applications using the d3d or opengl pipeline to start rendering. I will try to replicate with a debugger attached to see where the issue lies though.
[EDIT]
Hung on WindowsPlatformProcessor.cpp FEventWin::Wait
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this 0x0000000039cbba60 {Event=0x00000000000008ac ManualReset=false } FEventWin * -
FEvent {EventId=654603 EventStartCycles=0 } FEvent -
__vfptr 0x000007feda1350e8 {UE4Editor-Core.dll!const FEventWin::`vftable'} {0x000007fed9f4ac40 {UE4Editor-Core.dll!FEventWin::Create(bool)}, ...} void * * [0] 0x000007fed9f4ac40 {UE4Editor-Core.dll!FEventWin::Create(bool)} void * [1] 0x000007fed9f5dac0 {UE4Editor-Core.dll!FEventWin::IsManualReset(void)} void * [2] 0x000007fed9f737e0 {UE4Editor-Core.dll!FEventWin::Trigger(void)} void * [3] 0x000007fed9f6a3f0 {UE4Editor-Core.dll!FEventWin::Reset(void)} void * [4] 0x000007fed9f75950 {UE4Editor-Core.dll!FEventWin::Wait(unsigned int, const bool)} void * [5] 0x000007fed9f45ff0 {UE4Editor-Core.dll!FEventWin::`scalar deleting destructor'(unsigned int)} void * EventId 654603 unsigned int EventStartCycles 0 unsigned int Event 0x00000000000008ac void * ManualReset false bool
To reproduce I opened an editor. Opened another editor for another game (in this case the stylized rendering sample project under learn. Selected run in standalone. Alt tab, closed the standalone window. Selected the first window from the task bar.