iv tried everything and find that if the game is 30fps it will stay running low temperature but if u play black ops 4 at 60 fps my xbox one x will shut down.
its the gpu chip that is getting really hot running at height fps rates and have tried different heat paste and still the same,so i would say software update issue.
if the xbox was over heating then u would have it all the time not just on 60fps
im going to wait for a update fix