Banned for leaving

I noticed that if I try to leave Warzone, it threatens to ban me if I leave too many games. I thought this was a social playlist? Players can already join matches in progress, so why can’t we leave a Warzone game if it’s been running a long time because those games can go on for a long time.
Also, when I try leaving custom games or a campaign party, the game also threatens to ban me as well. This must be a mistake right?

I don’t believe it’s a mistake. The banning system is broke!

Does this happen to anyone else?