BUG: Dolyak masters's acting weird

Outside Camp Rankor, Myself and my level 20 hero monk fought them several times (she was level 19 to begin, I wanted to get final exp needed). They run to the entrance of Camp Rankor and get stuck behind sign or try to run into camp. The three herders follow but, go back half way to door. Then they turn and go to the mountain below res shrine, and stop all in one spot. They each heal faster than any damage can hit, even when the npc merchants ran over and fought the DM, it could outheal over and over no recharge time. My monk is mo/me and was casting phantasm etc, no real help. I was hitting for high damage but no luck they would heal back from half or lower in a split second and do this over and over. The really weird thing is they did zero damage to myself or hero.