When the above image wasn't changing as I moved in reverse, I looked out the back window...
pretty damn close, and the image displayed was of course, frozen in place on the display screen, and even after turning the vehicle off and placing it in park (not in that order) it persisted to remain locked on the image obtained when I first shifted into reverse in order to park.
See, in park. The radio display is supposed to resume when you shift out of reverse into any other gear. So, this is a warning... don't trust computers completely, verify with your mirrors, or look out the back window.