I think this is a straightforward answer/question and similar across all BMW bikes. Went to start my bike today and it would not start with side stand down or up when in first gear with clutch pulled in. All via push button starter. I think it's the clutch micro switch..
- Bike on side stand in neutral - starts
- Side stand up in neutral, bike starts
- side stand down in 1st, clutch in, nothing happens
- ride down road, kill engine, try to restart while in gear - no start
- ride down road, kill engine, put in neutral, bike starts
- bike running, in neutral, bike stand down, bike cuts out (as it should)