Yep. Happens whenever the round slips off the foot plate, or some part ends up lower than the foot plate. Usually just rotating or repositioning the round resolves this, but rotating big rounds can be a PITA.
One thing I can say, after years of processing some pretty huge and heavy rounds, is that I spend a lot less energy per pound moved today, than I did when I was starting out. You learn how to use a little simple physics to your advantage, I guess a little like Judo, using your opponent's strength against themselves. I can tip a round up on it's narrow edge and roll it one way or another, landing it back on the foot plate without all that much energy spent.
Thinking of the problem you're describing, I can usually get a cant hook on the round, even if not set at an optimum angle when the round is on the splitter foot, tip the round up on it's edge, roll it a foot away from the splitter, then reverse the tip and roll it back at a new clocking position, in order to get it sitting square and right. It doesn't take all that much practice, but do mind the fingers when maneuvering heavy rounds near the I-beam, they'll pinch you as they come back down onto the foot plate.