Xesht Gives Up

https://youtu.be/_7Q4KQLcIUA

Uploaded a video of this bug i got recently. When i get to the guy he just stops fighting, maybe follows me when i damage him but deals 0 damage to me even when starts throwing hands.

This does not happen when i am in party with other people.
I do not know why it started and what changed.


Should i stop fighting this boss? I do not want to get banned and do not aim to abuse him. I fought him two times with the bug - first time when it happens and once to confirm the bug.