The goalkeeper fumble is an interesting one to mention because that is the most common one and is ruled out every time. It comes down to the interpretation of "ball under control", if a keeper blocks a shot he clearly doesn't have control of it but if he parries it to his feet does the attacker have the right to tackle him before he gathers it? We all know the answer is no, so its the same for Mings. Does he have control of the ball? I would say clearly not because by the time its at his foot Rodri is on top of him, exact same as the clip I posted above of Ronaldo. At the very least the decision is subjective based on opinion and not fact. The ref should have looked at it and decided for himself if Mings had it under control.