I have just watched a youtuber having the same issue on a gaming X trio with Warzone and Metro.
He didn't try downclocking, but it seems certain games may be not fond of the higher boost clocks.
It may be a game thing, a driver thing or a bios thing, At his stage these cards are in their infancy so I guess we have to wait for some fixes.
I don't have those games to try, I have spent a fair amount of time running various benches of the games and benchmarks I have and a couple of hours in flight sim 2020 with no CTDs.
IDK if you can undervolt in AB ... mine is locked out, I tried adding them in the config file as a google suggested, but still locked off