Zolin keeps going

Bug Report ID: #4045927109

Defeated Zolin and partner. Talked to Doryani and picked up loot. Went back to town and then came back through the portal.

Once back in the zone, Zolin is at 0% health, but is actively attacking and casting spells. I'm able to leave the room at least, so the encounter is not locked.

Bug Report ID: #4223239424

PS: Apparently he got bored and after I walked some distance away, he decided to chase me around the zone.

I experienced the same thing returning to the boss arena via portal after killing them both. In this case, I had already completed the quest earlier, but happened to go through the zone again and repeated the encounter.

As you described, Zolin revived upon my return and was actively attacking me and casting spells. While doing so, he had zero health, no energy shield, and was immune to damage (or simply couldn't die again) until I left the zone. He could damage me.

This seems to have been a common problem and GGG is aware of it (having responded to another thread).