You know, I really should have clarified. The only time I have a problem with the inputs is when I'm doing it naked, in combos it works fine. But something about doing it naked throws off the timing of the inputs.
Still think it's because you are hitting
3
then, since when cancelling into specials on alternate controls OFF, diagonals aren't considered (except Cyborg's grapple), so you can't have this error. Do the move in training a few times until you mess up and look at your inputs. You'll see
3
. Holding
will NOT make you roll.
Just because this input error is possible to consistently avoid doesn't mean it shouldn't be made easier, especially considering the game was intended to have a low execution barrier.
EDIT: In testing it some more, I did find that you can override the back input with a forward input, but none of the buttons will override it. However, it seems that if you hit
3
, the inputs will completely cancel out and you will not roll in either direction, allowing you to cancel into any of the follow-ups again.