My PF parameters values jump up and down when that parameter is controlled by expression pedal automatically without touching the expression pedal. Parameters make jumps up and down about 2 to 3 value numbers. I have tried an Ernie Ball Jr. 25k, a Roland EV5, and a Rogue volume pedal. I have even swapped out cables when trying to use either of the volume pedals. The pedals I have work fine with MF and TF. This is really a problem when expression pedal is controlling intervals, it can go from -m2nd to -m3rd on it’s on. The other strange thing is that it is not constant, it does it for a while stops for a while and starts again.