Black Crow Minions Bug

Hi,

I've learned to circumvent this bug, but I think it's still a bug. Whenever I'm doing the Black Crow on an Endgame map, if I forget to instruct my minions to enter the little room at the third stage of the boss, they'll be stuck outside with a barrier that prevents them from entering. Since the room is really small and the minions are withing sight, they won't respawn, leaving you without minions for the rest of the fight.