It’s the first time I use Sentinel class and his spell Warpath.
You can literally move/push away any target just using Warpath, even bosses and elites.
With bosses it’s clearly a huge bug/exploit because if the boss does any aoe spell everyone can keep doing damage, move/push the boss to a safe area and avoid his spell and damage.
I think there’s also a risk that you can force stucking boss at the edge of the combat area.
If you want to reproduce this bug you need to use Warpath to the “corners” of your target.
I imagine the target is like a square (hitbox), so if I move myself on the edges I can push my target in the opposite direction.
EDIT: Rubberbanding can also happen when you are using Warpath