Jack is player of confidence, typical virgo...
He is born on 10-th of September, me myself 20..
So how I work as usual. As soon as I feel challenge at work or manager hires someone like me, I as usual seek another job, where I work alone and feel safety in terms of competition, that's when I operate better and do my best.
I like when I have something guaranteed and don't feel someone's breath behind my back. I don't say that it's good, but that's how I am and definitely not gonna change.
Jack also needs that guarantee, otherwise he ain't gonna play his best football.
Right now he feels challenge and lacks assurances from the manager I guess.
As soon that situation is resolved and gats guaranteed place, I'm sure he will be as good as he was last year.
Last year he knew that he will always play, no matter what and eventually he progressed to the world-class level..
At Aston Villa he was captain, one-man-team and also he was world-class there..
Challenge ruins him, safety makes him stronger.
Manager's job is to know each player and what makes them tick and manage team accordingly.