Rage-quitting on the last map when the enemy team is making a comeback (in an attempt to save MMR) won't work anymore: instead of immediately banning the rage-quitter, the server will unpause and give the Survivors an additional 15 minutes to reach the safe room. The ban for the rage-quitter (and any subsequent rage-quitters) will be applied after the game ends.

This will only work if the winner of all previous maps quits during the last map. This will not work if a member of the comeback team quits, or if players from both teams quit.