I thought I'd share my experience with this issue on my XV.
It started slowly but eventually the auto start stop failed. I rang the dealer and he assured me that it was a know issue and it was safe to drive my XV until I could get it fixed. This was confirmed because every time I switched off the car, it would give me a visual confirmation that every thing was OK (Green). (So this was not one of those cases where I had to get it to a dealer ASAP...)
When I did get