You are describing a mental issue, where the answer is a psychologist.
He was a disaster last season, but he was good when he first arrived. However it happens, he needs to rediscover that Original form.
Im not happy at all with him and want him replaced. But with the money we’ve spent and the contract he’s on, he’s going nowhere for a while. With FFP limitations and the amount of work to do to other parts of the squad, I can’t see us getting a keeper of sufficient quality to challenge him.
I hope I’m proved wrong, but I think we’re stuck with him for a season at least.