I have a 2555X Jubilee reissue that I bought brand new when they were first released. Recently two of the control knobs, the mid and bass seized up and became very difficult to turn. It got to a point where I had to use a lot of effort, and the mid knob just snapped off at the shaft. Anyone else had anything like this happen? I should note, this amp has been babied. Rarely left the house or my music room. I’ve owned quite a few amps and never had anything like this happen.