Although MIDI mappings work correctly, a hack was necessary in the pi-stomp code. Could cause user confusion.

[rreichenbach]

When a plugin parameter is "learned" (mapped to footswitch, knob, expression pedal, midi controller, etc.) the UI will show the actual MIDI channel +1. So if a controller is sending CC on midi channel 10, the UI will show channel 11. The pi-Stomp software has a hack to compensate for this, but it could be confusing to the user and make MIDI controller troubleshooting frustrating.

It's possible that this bug has been fixed in new releases of mod-ui. pi-Stomp is relying on the modep patchbox module for that code, so a fix maybe slow to come. We'll have to see if an issue exists against mod-ui and track when a fix might become available.