Well, I try this on steam vr imported the icon shortcut form the MT folger and did the same from pimax games and deleted the old icon.
Play the AH64d and i got 40 fps and no flickering. In all maps.
Hope it help.
Msi Meg x570 ace Max 64 Gigs Mem AMD RYZEN 9 5900x 12 cores and its running all 24 at 46 MHz thanks to RYZEN Master App.