Hi,
Try updating Direct x if there is an update.. Also make sure Visual C is up to date..
Verify steam files: From the 'Library' section, right-click on the game and select 'Properties' from the menu. - Select the 'Local Files' tab and click the 'Verify Integrity of Game Files' button. - Steam will verify the game's files - this process may take several minutes.
I wouldn't think so, but the minimum PSU is 850w for the RX 6900 XT.. Maybe you get a spike and it hits the limit?
Look at this link too: [Solved] Unreal Engine is exiting due to D3D device being lost - Driver Easy
AMD Ryzen 9 9900x, Asus Prime X 9070, Asus Crosshair X870E Hero, 64gb Kingston DDR5 6000, Samsung 980pro 1tb NVME, Samsung 970 EVO Plus 1tb NVME, DeepCool Mystique 360 AIO, Antec Titanium 1000w.