I'll add that I live on a long neighborhood street with kids, so when I back out, my cameras / surround view cameras don't turn off. Hence I routinely "X" out of surround view.
It's after I hit X to close the surround view screen, that I am no longer getting the cameras to return. Maybe if I hadn't closed them, they'd still be there??
I do wish the cameras would shut down at 10mph instead of 15-16mph...
That leads to my other tangent that Homelink doesn't geofence and auto pop up to close (when I back out of garage) depending on last time it was used... this is part of the reason I close the screens, unless I'm missing something