Beatbuddy Footswitch + and Midi

I use my BeatBuddy with OnSong using Bluetooth midi, I have it set to start and stop scrolling in OnSong when I start or stop a song using the main pedal. OnSong also sends program changes to the BeatBuddy when I change song etc,

The issue I’m having is when I use the external footswitch + to pause the BeatBuddy, OnSong caries on scrolling and I cannot see anything in the midi settings that helps. Has anyone else got this to work ?