I was just playing Big Team CTF and was banned for inactivity while I was holding the flag. I was waiting for my teammates to return the flag and wasn’t moving. I get why this is a thing, but not while you’re holding the flag.
Hey OP, please use the ban thread pinned at the top of the Halo 5 forums for any queries on matchmaking bans.
To be removed from a game for inactivity, you need to have been still / not moving at all for 3 minutes. To get banned for this, this won’t have been the first offence you’ve had