I did notice that Ollie gestured to him that he should have kept running toward goal to challenge a loose ball from a saved shot from Ollie.
There's a collective spirit in the side right now that is buoyant, but Moussa might feel a bit separate from it because he's lost the starting role and he probably thought he'd be the big star here. I noticed that in that dressing room photo, he was off to the side, but it likely means nothing.
But who really knows. He could be nursing one or two knocks, might be not fully settled in Sutton Coldfield, family issues, etc.
I think he'll be fine, he is still young but he seems to have a good head on his shoulders.
I expect him to start on Thursday and maybe Sunday as well. So he'll get his chances to get a head of steam going again.