I'm having an issue in Ableton Live v9.6 after touching the Nav L<>R on the SS2.
MIDI settings; Input: SSCOM (Port 1) TRACK & REMOTE on (everything else off)
1. I plug in SS2
2. I start Ableton Live v9.6 on OSX v10.11.4
3. I can tap a few buttons on the SS2 and I can see Ableton receiving them
4. I change the SS2 up or down a preset
5. Ableton no longer receives MIDI from SS2
6. I return to the original preset on SS2, still nothing
7. Leave Ableton running, unplug the SS2, plug it back in
8. MIDI is received again
9. Change preset on SS2, gone again
Any ideas?