Some time ago, Tesla changed the software for the driver's door. It was changed to prevent the door from continuously opening as you walk around the X. For example...prior to the change if the door closed and you walked around the car, it would reopen. Following the change, the door Auto Open has a 30 second (or there about) delay. It will not auto open with 30 seconds of closing. Drivers were noting unwanted openings, so the software was changed. Even if you walk away and return within 30 seconds, the auto open is inop. assuming you are not returning as a driver so soon. After 30 seconds, if functions as normal.