@Tappin This has been happening to me as well on occasion. It usually starts happening after a few hours of pulling fine. My puller starts acting a little weird, he will strafe to the sides and back and forth a little and will not use the bow for pulling, nor go too far from his pull spot. Do you also have your puller very rarely start going past the camp and pull radius? I have my puller using KissAssist, custom UI, MQ2Hud, Puller also sometimes stops pulling mobs all the way to camp and fights alone or barely in heal range of the cleric. Once puller dies, I have found he has more problems pulling since he has a corpse he won;t bring home. To fix it I /end the KA macro and restart it.. but if playing for a few hours already seems like what worked best is log the puller out and relog back on to clear up the issues for awhile, but after a few hours I see it return.