Not exactly game breaking or even effecting the game at all that I can tell; but as soon as I hit 100 enslavers killed the feat started showing as complete for the purposes of total feats complete. I have not completed this feat before and I did not receive any rewards for it being completed; nor did the pop up show saying I had completed it. The tracker is correctly showing at 102/200 as of this moment. Likely just a visual bug but figured I should report it.
Iphone 5
IOS: 8.1.1