Thanks for the video, very interesting. That’s not how it should be behaving.
Can you try one thing for me: after you play and stop a sample, and the button is still white, can you press the „Test“ button in the advanced MIDI settings in djay? This will send a sequence of max, min, and then the current value (i.e. min if the sample is stopped). Does that do anything with the button LEDs?
Btw. you can see what MIDI values djay sends the controller using this MIDI Monitor app, maybe that’s helpful:
https://www.snoize.com/midimonitor/
