On my last 2 friendly matches
(29099240) (29110581) the center reserve played minutes as a starter and is marked as a starter, even I am sure was set as a reserve.
It could be verified that was reserve, because when I set up a new match orders, based on the discussed matches, he is reserve, not starter.
My center real starter choice played just 11 and 13 minutes on those games.
So, I lost minutes of training and the players form was affected