He should be finding space between the fullback and CB. Not constantly chasing after the ball.
I'm 99% sure he's doing exactly what Guardiola wants him to do. Not only has he played every game possible, which is a massive endorsement when we've got options to bench him.
I've very rarely seen him get a bollocking/correction from Pep on the sideline the way that most of the team do either, when they talk it seems much more like passing tactical orders on.