I'm going to switch to the factory power supply and see if that helps. My pedal board is a Pedaltrain PT2 so yes it is metal although it didn't seem to be a problem for the better part of a year.
I have tried different channels and it didn't seem to help.
I will see if my local dealer can upgrade the firmware and if not I'll be looking into sending it in and having the service department do the upgrade. Any chance you can give me a ballpark estimate on the service department cost?