2017S75/HW3/FSD2/MCU1 - After installing my teslacam for the first time, I notice on file playback through the tesla viewer that there is no rear camera footage. Although the front and left/right repeaters video is quite good (considering I only have MCU1), the rear video panel is blank, showing the error, "rear camera (not found)". What could the reason be? Any similar experiences???