There is a counter-argument to things like this (e.g. skating, vibrating players, jelly legs and balls going through limbs) which I've heard a few times - "it's just the animation system, the wrong animations / stance is being chosen, it doesn't affect gameplay".
But if your player should be falling over and doesn't - or the ball should be deflecting and doesn't (or deflects in a physically impossible manner to magnetise to a player)... They're slightly different things but I'd argue it's reflecting the core gameplay issues.
