I was in the frontier the other day, and while i was wondering around, i came across a spider. It approached me, and i started swinging my diamond sword. 10+ hits later, the spider was still not dead and it ended up killing me. There was a chat message in red font that said something along the lines of, "The monster is having trouble getting to you, so it has been moved closer." That appeared at least 3 times. Maybe it is something wrong on my end, but i've died many times because of this.
I think this is because went to sleep R frontier and started punching mobs on difficult 10. Also isn't on 10.
Those "features" detecting when a mob can't reach you are really buggy and inaccurate. They will resist damage, but not get "moved to you" on lower difficulties. The website says something about it not affecting vanilla drops, but it obviously affects vanilla mobs...
