I ran across this last week (game mode) and did turn it off to test.
I'll look at the "KB5004296" fix listed and see what I can find. I tend to apply all updates so if it's been released I should have it. If not, ill grab the pre-release.
I ran a stress test/benchmark (using 3dmark) and it ran entire process w/o issue. I tried the Endwalker benchmark (same engine as game), it made it about 1/4 way in before rebooting.
Thanks for the suggestions. I'll keep digging.