When fighting against any team in this PF if an enemy character receives enrage from any source they will not lose their 5 stacks of enrage no matter the amount of hits suffered. It occurs after the temporary enrage ends and they're left with 4 soft permanent stacks. These enrage stacks still have the benefit of giving the opponent meter per second which makes this a pretty significant issue. The stacks can still be removed or stolen with character abilities however. I discovered this when playing against teams that used Rerun Peacock. I play on an Android OS Moto Z4.