Removed from fireteam while playing solo

Does anyone have this happen to them while playing by themselves? I’ll be searching for a game in arena by myself and suddenly it returns me to the main halo screen saying I’ve left a firearm (how is this possible when I’m solo). Kind of aggravating as it just happened to me for the first time mid match, and then they throw the banhammer at me for ten minutes for “quitting”.
If this is a known problem, are there any fixes for it? Thanks for your time

It’s Halo servers laggin out and kicking us out. Got a ban from this one time.

I have experienced this I thought itmightbe down to a friend trying to join as a game is loafing, the server handshake being lost and getting , hence dropping you out