Yes I am assuming it has something to do with the Start/Stop. The manual does say that even if you do have Start/Stop ENABLED, the car will NOT shut off at stop lights, etc. if certain conditions warrant to keep engine running (like low battery voltage, High temps that need to keep AC running, etc).
That I understand.
But I run in Custom mode all the time and in S mode, which disables Start/Stop automatically.
If it was 100% consistent I would say its a feature, but sometimes I put it in park on same day, same conditions and it does not shut off, sometimes it does. Can't figure out the algorithm or pattern. Not a big deal, just wondered if it is normal.
Hard to tell if its right or some software bug.