I've been noticing that a lot too. I feel better about myself when I make replays in an older version - its actually easier to do because you don't self dm every turn.
On and a few things to note:
1. This thing has been happening in multiplayer since long before;
2. It might not only keep the bruise but also the force applied to joints, like when you extend knees at high speed for example. Not sure about that though.