Headhunter buff makes mobs passive.

Have been playing with HH as a warbringer and noticed that one of the rare mob buffs seems to make all mobs passive.

They just stand still even if you're standing next to them and only engage if they take damage.
Then they start pushing you all over the map without doing any actual damage.

This continues for the remaining clear of the map but for the next map things are back to normal, or atleast until you get that same buff again :(