It's a tiny notification bug that appears over the tower, saying I have a reward to pick up, but I don't. It appeared after I bought the DLC, and only shows up on my sub characters destination screen. I've done missions that give you rewards, to try and erase it, but it stays as an invisible pulsing notification, that when hovered over, tells me I have a false reward waiting in the tower. It's not really affecting the game in anyway other than being irritating.