It's just the quick release thingy on the new ones.
I can't get the tight enough to stop twisting. Ok for a bit, but as soon as I put more effort in, they twist when I land.
If I use something to fully tighten the screw, I can't lock the lever. lol Maybe it's just me, but at some point I'll do it with someone else there who has them.
At the moment, Im using them with Knee bars