I had the strangest problem today. I drove the car for 5 mins and came back home to collect my wallet. Got out of the car and closed the door (engine still running) with the keys still in the ignition. Came back after 30 seconds the car had locked. Couldn't get in at all and had to call a locksmith to open the door so I could get to the car. (no 2nd when I bought the car) Has this happened to anyone before ? Do you know what could it be?