Did he even play for the first team at all last season? Can't remember a single game.
Iirc he came in injured, then played some games, was horrible and basically out of the team. Transfermarkt says he played 11 games in 18/19. Very similar to his start at Freiburg where he also was way out of his depth and pretty rash, but Streich persisted with him and he came good after a while.