Reversing camera screen

The HS entertains us again with  another interesting experience to have.
Suddenly whilst reversing the Bourton into the barn, between two parked motorhomes, the picture on the rear view picture on the screen suddenly reversed    the left went to the right, the right to the left and the writing also reversed. The picture is still the correct way up.
. The Haunted Snail is still active !
I tried to operate the control hoffer doffer  to no effect.
Any thoughts anyone ?

Same thing happened with the camera on my Broadway.  Camera was replaced under Garmin warranty.  Had to fit it myself. Camera had to be returned to Garmin before they sent out replacement.