This happens to me on the way up a little bit as the weight gets heavy. I tend to shift over to my right side and my ass moves. I try to correct it and when I pay attention I can notice it, pause, and correct the movement. But for some reason I just end up trying to do it most of the time. Very annoying. I feel like it is caused by one leg wanting to push harder than the other.
Any cues for this would be appreciated.