Before anyone asks the obvious question - yes, walk away locking is enabled. I’ve returned to my vehicle a couple times in the past week to find that it did not lock. Both times my 3 had been charging, not sure of this is related though. I called tech support and the tech I spoke with mentioned something about the “RF sensor” going to sleep after a certain amount of time. I don’t understand this though because it only takes me a few seconds to connect the charge cable and then walk away. My phone has not been inside the vehicle on either occasion. Opening the door and pressing the brake to start the vehicle confirms that it does not detect the presence of a key. I consider this to be a serious security flaw or firmware bug. I shouldn’t have to check my app each time I walk away from the vehicle to ensure it is locked.