Does this message pop up when it crashes as it does for me??
LowLevelFatalError [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 796]
Rendering thread exception:
LowLevelFatalError [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 932]
GameThread timed out waiting for RenderThread after 51.18 secs