I never had any lateral open bite issues (or any open bite at all really) before surgery, but I also developed an open bite between my 2nd premolars and 1st molars on each jaw some time after my surgery once the braces came off.
I this happens when the patient needed a 3 piece to widen the jaw. Or at least proper diagnosis of a tongue thrust. So, another terrible side effect of improper planning.
I did indeed have a 3-piece for upper jaw widening and it's still too narrow for my tongue. Just goes to show how narrow my jaws.