Pull of the Abyss bug

I noticed a very annoying bug when playing with my rift mage: If I begin a fight (aggro otherwise un-aggroed enemies) and use Pull of the abyss as my very first move, the enemies within the range are effected, but once the spell ends, all of the enemies magically pop up right in front of my mage. So i tried putting a fire mine in the middle and then cating pull of the abyss, but the same thing happenned and the enemies glitched right out of it and instantly appeared attacking my mage. Essestially, I have to actually cause damage to an enemy or group of enemies before casting pull of the abyss otherwise it will essentially not work. Any ideas or thoughts?