Why Is His Fitness Not Going Up?

I've Left Him Out The Team The Last 2 Games And Every Training Plan I've Done With Him It's Said He Would Have Full Fitness And Sharpeness? Is This A Glitch As This Happened To Me With Araujo Last Season And I Had To Leave Him Out Several Matches Which Caused Him To Put In A Transfer Request Which I Hope Doesn't Happen With Saliba. if Anyone Can Help With Solutions To This I Would Be Really Greatful