Fix is needed in Drivers.
Temporary workaround is to disable `Flags.bCompositeDepth` in `Oculus\OculusVR\Source\OculusHMD\Private\OculusHMD_Settings.cpp`
Depth buffer corruption/artifacts when using VR with certain AMD GPUs
Tested with Oculus DK2, User reports with Oculus Rift
Result: Depth buffer corruption (see images)
"Workaround": Reverts to normal after taking a High-Res screenshot
Also can be circumvented by not using directx 10 / 11
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-64034 in the post.