Manager Career - constant substitution suggestion after foul

I was playing a game in Manager Career and thought I'd try out the new "professional foul" function, just to see what it was like. It was early in the game and my player rightly got booked for it. For the rest of the game, every time the play stopped, the Quick Sub button came up and it was suggesting the booked player be taken off, even though his stamina was still very high and he wasn't injured.