So there I was on Tofs second floor. It was a bad pull and we evaced. The mobs warped to the zone line. This was bugged a while ago when trying to give credit to dotting classes after death. Then the change was reversed, and now it's back. There have been other times where fade/evac/etc didn't remove agro.
Technically, evac is wiping aggro. You are initiating new aggro with dots and hate over time spells, most likely. They keep tickingafter evac.
If you want more information the thread in veterans forum is here. https://forums.daybreakgames.com/eq/index.php?threads/agro-is-all-messed-up-please-fix.256714/