Same problems here 4.25.3, RHI enabled (directx12) on rtx2070, on rift: if disabled the problem disappear.
no problems with 4.24.3
https://forums.unrealengine.com/deve…latest-drivers
Edit:
Solved by VictorLerp , many thanks!
Just disable oculus splash screen at startup…
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https://forums.unrealengine.com/core/image/gif;base64