I’ve noticed it’s been happening more frequently. You join a game, the host is a bit passive aggressive and if you fail the mission they will Alt + F4 the game to prevent players from getting the XP for failing the run. I’ve had one host tell me that that is their intention because the failed run was our fault.
The host should not have this much control. A kick should come with a 2 hour cooldown or something and any failed connection should result in all members getting experience up to that point in the map.