Heres some of the info the crash report told me
Fatal error: [File:D:\Build++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 182]
Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0006 - ‘HUNG’)
UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_D3D11RHI!TerminateOnDeviceRemoved() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11util.cpp:192]
UE4Editor_D3D11RHI!VerifyD3D11Result() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11util.cpp:231]
UE4Editor_D3D11RHI!FD3D11Viewport::PresentChecked() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:290]
UE4Editor_D3D11RHI!FD3D11Viewport::Present() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:473]
UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHIEndDrawingViewport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:592]
UE4Editor_RHI!FRHICommandList::EndDrawingViewport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\rhi\private\rhicommandlist.cpp:1361]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindow_RenderThread() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:891]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:1048]
UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1453]
UE4Editor_Slate!FSlateApplication::DrawWindows() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1149]
UE4Editor_Slate!FSlateApplication::TickApplication() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1726]
UE4Editor_Slate!FSlateApplication::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:1548]
UE4Editor!FEngineLoop::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3182]
UE4Editor!GuardedMain() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll