Forum:Playthrough 2 Turn In Issues

Hey guys, I'm somewhat of a long time player of this game, having completed the game several times over, with each class. I have never had issues with playthrough 2 before, but I have just began Playthrough 2 using a Level 47 Hunter, and am having trouble turning in the "Fix'er Upper" mission. I have found the power coupling, I have installed it, both of which have been checked off as completed objectives, but when I buy a shield, the objective doesn't become checked off, and the mission can't be turned in as it is still incomplete. Anyone have any ideas on what may be causing this?