Stop spawning Abysses in map boss arenas

Thread title.

This is some of the worst gameplay I've experience in POE1 or 2. You know what's not fun? Having a map boss, 4 rares with the worst mods in the game, and about 50 assorted blue/white abyss mobs all trying to kill you at the same time to the point that you can't even move and have to tank "red flash" attacks repeatedly. For god's sake, hotfix this shit please.