I had an issue last week where I would start a game (ANY game; matchmaking, custom game, campaign, even theater) and within a minute of playing the game would lock up. If there was sound playing it would lock up as well and eventually I’d get kicked back to the dashboard. It only happened when I was online, I could play campaign offline just fine.
I did a factory restore to my Xbox and reinstalled and it started working again. Last night, the issue showed up again. I couldn’t play matchmaking to save my life. Custom games worked however.
I really hope this is something addressed in the upcoming patch, because it’s very disheartening.