It’s when they come running from off screen when the screen is empty so you’re checking something. Reduce their off screen player detection(I made that term up)
Let me open chests even if 50 monsters are attacking me. I do not care. Just let me take damage and open a chest at the same time. If I die I am a chest opening buffoon. It’s bad enough when chest opening gets interupted by 1 puny monster scratching you or a slow moving projectile that beat the chest timer.
Let me town portal interupted as well. Otherwise mobs keep spawning on top of you and you can not leave.
Keep monster density including with profane mindcage as is just stop the interuptions that happen because of said mob density.