Chordcat: Unit sends MIDI messages when changing sounds

Chordcat sends MIDI messages when changing sounds. This may cause slave units to get into an erroneous state (in my case, this is a Roland SH-4d which shows "not available!" and does not produce any sound on the respective channel until switching presets). Below, I posted a screenshot containing information for two sound changes (within group "Keys 1" from first to second and from second to third preset).

Please add an option for stoppig this behavior (maybe filter MIDI program changes?),