Camera System problems of the 2017 Tesla Model X

The contact owns a 2017 Tesla Model X. The contact stated while reversing there was no image displayed on the infotainment screen. The contact stated that the failure occurred intermittently. The contact stated that the center front camera failed to record. The vehicle was taken to the dealer who stated that no failure was found. The contact received notification of NHTSA campaign number: 21v035000 (back over prevention, visibility, exterior lighting) and scheduled an appointment with the dealer however, the dealer cancelled the appointment. The manufacturer was notified of the failure, but no assistance was offered. The approximate failure mileage was 49,000.