Stuck offline

I was playing just fine a few hours ago, and I went to join my buddy about a half an hour ago, and I was stuck offline. Not sure what happened. Was I banned? I haven’t been boosting, and I’m not super good or anything. I’d say I’m just average, so I’m not sure how the system would mistake it for boosting or cheating.

I tried restarting my game, checking my network was on Xbox Live and relays were off, restarting Steam, running ipconfig /flush dns, ipconfig /release, and ipconfig /renew, and I rebooted my computer. No ports should be in use as everyone else in the house is asleep, and I was playing just fine earlier.

If I was banned, for some odd reason, would there be a way to find out and get it resolved? I love Halo, and I’d hate to not be able to play it anymore.

Same issue here. When I go to see season rewards it says “offline” as well. And i was playing fine with my buddy a few minutes ago.