Do the interior lights come on when it happens? Something is probably triggering the easy exit feature. Maybe the ignition lock cylinder, or the door switch. I know the ignition cylinders get loose and cause the interior lights to come on, I've had mine replaced for that. I don't use the easy exit feature so I don't know if that would have been a problem too. A quick easy way to test is to push the ignition key in toward the steering column while it's running and see if the lights come on or if the seat moves.