Yes. On a trip back from San Diego (600 miles), I drove quite a while without TACC and Auto, which had just disappeared overnight. Then I began to think: When a computer stops working, REBOOT. Push both scroll wheels in and hold about 10 seconds, until the screen goes blank. Reboot the dash screen by holding the two buttons above the two scroll wheels.
I rebooted the main screen as I drove. It took it about 5 minutes to reload everything (the screen comes back quickly, but some of the background stuff takes a while), and then, "POP", there were my Cruise and AP logos back on the dash, and everything worked from then on.
It seems that reboots are more common with my new 90D than with the old Sig, but I wonder if it's just because there is a bunch more software stuff going on.
I have once rebooted the whole car, on the control screen, E-brake and Power Off. I did not do that while I was driving, though.
Remember. If it doesn't seem to be working right, REBOOT.