[Bug]Maw of Malmortius

Hi there. There seems to be a bug with the new Maw of Malmortius . If you proc the shield and the new passive Lifegrip and manage to keep it active until the cooldown is over, the shield won't proc again. There seems to be a mistake that wont let you get the shield while Lifegrip is still active. Maybe because Lifegrip can't stack.