I found out what the problem was, it turns out it was just my M-audio Ex-p. I tried out this one yahmaha expression pedal and it works fine. So relieved it wasn’t a problem with the hog.
I’ve tried that, I switched it from other to M-Audio n got nothing. I’ve also tried it out on all the other expression modes & it seems to work fine. It’s only in the Octave bend mode I’ve been having this problem.