I've got a LowDown 150 combo that I've owned for about 4 years and has been my main gigging amp (60+ dates a year) for the last two years. Lately one of the channel presets has not been "saving" the info I program in. The button will flash constantly (like it does when you've changed something to the existing preset), even when I haven't changed anything. And then when I switch channels (or hit the mute switch) and come back to this channel it's not like how I had left it. The other 3 channels seem to save themselves fine and yeah I suppose I could work around the bad channel and just use the other 3 but it's kind of bugging me. Anyone had this happen to them?