the I.A of boss turn off, and the boss stop attack me.
all bosses lvl 56+ are stoping attack.
Not all, I’ve seen one. But don’t remember where
Had the same problem. At the start the IA was working fine, but it stopped working in the middle of the fight.
I had this Chafer and another one at Kvailas Forest (Believer Kazis’s quest) that didn’t make any damage.