My keyboard has Poly Pressure (NI Kontrol MK3). This is quite distinct from Channel Aftertouch, as the controlled value pertains to each played note independently. When I bind keys to chords in Scaler, the keyboard sends both NoteOn/NoteOff messages and a steady stream of Poly Pressure messages. The generated Midi for the chord, has the correct mapped NoteOn/NoteOff messages for all the chord’s notes, but passes through unaltered the Poly Pressure messages for the originally pressed key. This is definitely wrong as it pertains to a note that most likely is not playing. The messages could be mapped to each generated note of the chord. Or they could be mapped to Channel Aftertouch. Or (simpler still) they could just be discarded.