Thanks for the reassurance. I waited a few days, and it's back!
What confuses me is why the developers would have a software switch that turns off both radar and camera functionality. Under what conditions would this be appropriate? And, why didn't they tell the rest of the team, who create the error messages?
It seems clear to me (a former software developer and manager) that the switch is in RAM, and it is normally in the ON position, allowing radar and camera functionality.
But, once in a long while some error in the software, or maybe some cosmic ray, hits that memory location and turns it OFF.
Also, that memory location must get hit once in a while by another software error that turns it back ON.