My Flexton iii has a mind of its own that it changes its tone to muddy no mattter how I dial in and tweak. A few seconds after tuning in bass treble and Mid, the amp gradually gets muddy and bassy. If I turn any of those knobs it goes back to normal immediately but gets muddy again within seconds. This is not the same as the volume drop problem. I have firmware 1.1 and have already flashed with the monkey and did a factory reset.