System: Xbox 360 I've been having problems with the checkpoint events. Not all of them...However, when it does occur, it's the same bug. Example: The target will spawn near me. I shoot, throw grenades, melee and as soon as the enemy's armor is down, it regenerates almost instantly and cannot be killed. He stays in one area the entire event until the last minute or half a minute and disappears to the last checkpoint, then the event is over. In another checkpoint event, same issue, but the enemy and its allies did not shoot back. I hope the developers have a chance to see this post to help fix this problem.