I cant believe this is still a thing. Every now and then I get randomly temp banned when I haven’t rage quit from any games…
Please make sure to file a support ticket on the Halo Support site along with any evidence you have. If you don’t have any videos right now, make sure to record the last minute or so of your gameplay the next time it happens - from ending match into the post-game lobby where the ban message appears and note the date/time in the ticket too. This will be helpful to 343 in tracking down issues