Currently, once a game starts, players have until the end of their first round to select an ability, then their ability is locked in. While this usually works fine, a player who joins a match at the end of a wave can have their ability locked in before they get a chance to select it. This oversight would be fixed if players didn’t get locked into an ability until after they chose their class.
or they can just… rejoin.
Sure, but this is a quality of life thing. Besides, leaving gets rid of the wave bonus, and if you leave, there’s no guarantee that you’ll rejoin that same map.