This is a common crash occurring on Windows and Mac in 4.15 and 4.16 (two different callstacks with close similarities). The callstack is also similar to [Link Removed] and may be related.
User Descriptions
repro steps currently unknown
Fatal error: [Link Removed] [Line: 327] SwapChain->ResizeBuffers(1,SizeX,SizeY,RenderTargetFormat,DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH) failed at D:\Build++UE4+Release-4.16+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:220 with error DXGI_ERROR_INVALID_CALL, Size=536x256 Format=DXGI_FORMAT_R10G10B10A2_UNORM(0x00000018)
UE4Editor_D3D11RHI!VerifyD3D11ResizeViewportResult() [d3d11util.cpp:318] UE4Editor_D3D11RHI!FD3D11Viewport::Resize() [d3d11viewport.cpp:222] UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::ConditionalResizeViewport() [slaterhirenderer.cpp:405] UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private() [slaterhirenderer.cpp:1031] UE4Editor_Slate!FSlateApplication::PrivateDrawWindows() [slateapplication.cpp:1453] UE4Editor_Slate!FSlateApplication::DrawWindows() [slateapplication.cpp:1149] UE4Editor_Slate!FSlateApplication::TickApplication() [slateapplication.cpp:1726] UE4Editor_Slate!FSlateApplication::Tick() [slateapplication.cpp:1548] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3182] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-47762 in the post.