Known game bug that was fixed. The beta is running on older code, so this is expected and not fixable.
I will note however that VKD3D_CONFIG=disable_uav_compression %command% does let you play the game with AMD + FSR3 and the beta. This workaround as you said wasn't needed for the benchmark which seems to be running newer code.
fsr black screen
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VKD3D-Proton version: Latest