I’m sure this has been reported in the past but I’d like to call attention once again to this bug with Paladin’s Barrier.
Barrier’s knockbacks only works around the boundaries of Barrier, not inside the Barrier area itself. This means sometimes mobs will get through the boundary and be able to walk freely inside Barrier.
This bug kills the whole purpose of the skill and makes it not so reliable in many circumstances. We, Paladins, cannot guarantee the safety of our party members from melee-damage mobs because we can never tell when they’ll be able to move inside Barrier or not.
I understand some monsters are immune to knockbacks and I’m not complaining about those. Barrier will sometimes fail to work even against mobs not immune to knockbacks, as seen in the video: