Blank Navigation Screen


I got a blank navigation screen with just "T E S L A" on it after running an errand and getting in my Y, but when I pressed the car icon at lower left I got the car menu and the settings menu showed up and other screens displayed (like control, trip, nav settings, etc. I pressed the double scroll wheels and it said no connection, and also the signal (or wifi?) bars have a slash through it. So I guess there was no 3G or 5G signal? I double pressed the wheels longer to reboot and still blank nav screen. I drove off and only some 20 feet away the nav map displayed. This was strange as it was in an area where I've never had signal problems. I didn't check my or my girlfriend's phones to see if they didn't have signal bars.