Unexplained crash

I don’t know what to make of this issue or how to solve/ fix it but strangely enough this only happens when I’m playing Halo 3’s multiplayer. It doesn’t happen frequently but it happens once a blue moon, so to speak. Once and a great while, when I start a match, my game would ultimately crash resulting in my console itself shutting off. If anyone out there in the Halo community can assist me in this issue, that would be great.