RYTM Double Notes After Prog Change

RYTM Mii OS 1.45

Sending Midi Notes (CH1) & Program Changes (CH13) from Ableton via Launchpad Pro MIDI DIN.

Intermittantly but quite often when the Program Change occurs I’m getting Double Notes on the BD Track.
It doesn’t occur every time, but at least 50% of the time.

Can anybody offer any suggestions for trouble shooting this issue?

Has anyone struck this problem before?
Could it be a bug?

Thanks in advance.