Navigational (global Positioning System) Gps problems of the 2018 Jeep Wrangler

Backup camera randomly does not work. Sometimes the backup camera will work but without the guidelines. And sometimes the backup camera will not work at all, only showing the navigation gps screen completely black. It malfunctions like this while backing up in my garage, or backing up into a parking spot in a parking garage or on a city street. I was informed by two dealership service department representatives that they can't do anything about it unless it is not working when I bring it in, so they will be able to diagnosis the problem correctly. Of course, it always works properly when I bring it in to the dealership. I have videos from my iphone when it malfunctions but the dealership said they were sorry and can't diagnosis it with the video, and that it has to be in the malfunction mode at that time before they can do anything about it. I currently have around 8,600 miles on my 2018 Jeep jl sahara Wrangler and this problem started around 4,500 miles or maybe slightly less. This is very frustrating! I specifically paid extra for this Jeep model to get the backup camera. And it only works properly about 60% of the time! I never know when it will work properly or when it will not work at all.