I have had several incidents where my car ds not restart after auto-idling at a stop light. When there is a delay in restarting, a warning flashes briefly that there is an issue with the collision mitigation system. On some occasions, it fails to restart completely and I have to turn off the car, open the door to reset everything, then close the door to restart the car. I have had it inspected by Honda several times and was most recently told it needed a software update, but it has continued to happen since the software update.