We don't understand either. It could be hardware related, it could be some very rare combination of events/customizations in the game. It's obviously been a very difficult one to track down. I truly hope we find out what is causing this. I know this would be absolutely frustrating and disappointing.
Can you send me the day/time along with your time zone the next time this happens? We may be able to pull logs for your account. That might help. Are you on a Series X or S?
Also, if you happen to notice any similarities with each crash, let us know. At the moment, this is extremely difficult to reproduce because it's seemingly random and has not crashed for any of us with normal gameplay.