So this started happening within the past while where I'm getting crazy high pitched feedback from the unit when connected to my head and cab ( haven't had it doing it through headphones *yet*) if I pull back on the expression pedal to zero and back to full volume sometimes it fixes itself, other times I have to turn the unit off completely and back on again and aswell sometimes works but not always.
I've heard the sensor underneath the pedal may need covered but I don't see how this would make the unit act that like so any help would be much appreciated thanks in advance
