Might point to a deeper issue but you can do some more testing to see. Make sure FSD beta is enabled and set a navigation route. While the car is driving reboot the touchscreen by pressing and holding the two scroll wheels simultaneously until the screen turns black.
Note that you won't have any safety warnings, backup camera, turn signal sounds and more while the touchscreen reboots. Car should continue following the navigation route and make all of the stops, turns, etc.