This just happened and the player joined in as we were at the end of the lift ride.
I’m guessing it has something to do with the bots position since we did force the bot to teleport to us in the lift and I’m guessing that might be a cause.
Video of what happened from the moment the player joined to them spawning in the boss arena
https://www.youtube.com/watch?v=iaFAjsYZ1zg
Looking again at it now, pretty sure that clan rat at 1:10 shouldn’t have died yet it did.