I have a 5 star midfielder. Best quality midfielder I have, and he is probably the worst performing midfielder in my team. Seems bizarre, but he's constantly on the bench. Keep trying him out, but just doesn't perform. If he does it's for one game, then back to rating of 5 or 6.

But then on the other side, I have a 4 star midfielder (same position) and he's banging goals in, setting up goals and performing 7+ rating every game.

Must be missing something