The 12.0-inch Uconnect system continues to be plagued by general sluggishness, occasional reboots, and—this one is new for us—a backup-camera display that refuses to disappear long after you've pulled away in Drive.
If anyone is having this issue, I can speak to it's cause and fix. I can reliably cause this to happen by putting the truck into gear too quickly after starting. Where I work, my habit is to jump in, push start, immediately back out, shift to drive, and then fasten seatbelt, as it is usually an empty makeshift parking lot a ways from the street. Noticed on days I'm in a hurry to leave, the same sticking back-up camera would occur. Tested it out and it only occurs when shifting into reverse before the UConnect load screen starts to initialize. If I wait just 2 seconds after push start, it never has once occurred.
If this does happen to you, there is a simple fix. Pull up your backup camera through the icon on the center display, then close it using the "x" in the top corner. The screen instantly reverts to normal operation.