Hi, I just bought a Line 6 FBV Express pedal.

I've calibrated it, it all works fine. Only one problem.

When I'm switching between banks (Bank 1 is a heavy tone, Bank 2 is a clean tone), If I switch from 1 to 2, the volume is fine. But if I switch from 2 back to 1 again, the volume on Bank 1 is a lot louder than it was when I previously switched.

Is there a way to stop this from happening?
Or do I need to manually adjust the volume with the pedal once I switch back to Bank 1? If so, this would be very annoying on stage.