I had similar problem n the 990. It could be the side stand switch. If it cuts out as you engage the clutch fully.
On the 990, i think 950 is the same there is a micro switch that stop the engine firing in gear with clutch engaged. Try it on the centre stand, engine running put it in gear then engage clutch as you would when you pull away and you may find that no matter where the throttle it cuts out at the same clutch position each time.
That may indicate a faulty side stand switch as the system thinks the stand is still down. I always thought it was done through the neutral light but it appear not on these.