oh, actually it will take longer to hit github because it was submitted into a branch.
I’ll just describe the change so you can make it locally rather than wait a few weeks.
Engine/Plugins/Runtime/GoogleVR/GoogleVRHMD/Source/GoogleVRHMD/Private/GoogleVRHMDRender.cpp
Near the end of the function ResolvePendingRenderTarget() there is a line:
RHICmdList.Flush();
Change it to:
RHICmdList.ImmediateFlush(EImmediateFlushType::FlushRHIThread);