Navigational (global Positioning System) Gps problems of the 2016 Ford F-150

While trying to backup my rear view screen camera is black and flashing on and off so fast that I can’t gauge how close or far I am away from an object. Everything works ( radio, gps, source and other things) with in the screen it self. But the problem is threatening to my safety. I ve tried to reset it by the recommendation of Ford but to no avail.

Navigation system. Ford has not made available an updated navigation map for the 2016-2018 f150, expedition and probably other vehicles including Lincoln that I am not aware of. The dealers seem to be in the dark about this subject and no word from Ford either. I have had to quit using my nav system for fear that it will direct me to a street that has been removed due to new construction or through an unsafe part of town when newer safer options are available. There are times when I would look at my nav screen and it looked like I was driving in the middle of a field with no roads around me. It's an unsettling feeling when driving thru a strange town at night. This issue is all over the Ford forums and I think many of us would like to see this issue resolved before someone gets ;out and hurt or worse. This happens when driving and it happens anywhere there has been new construction or demolition. It happens everyday at all speeds, it has been an issue since the day the truck went into service 5/30/16. It was delivered with an out dated nav map. You see this on the news from time to time where the nav/gps sends someone the wrong direction and something bad happens to them. Any help would be appreciated. I am sure there are thousands, or 10's of thousands of vehicles with this same problem.