@patty I have the same problem as well. I have two Zmodo Pan & Tilt cameras.
In August, both were updated to firmware version V18.104.22.168.
Since the firmware update, once a week the cameras will randomly rotate 180 degrees and point backwards.
When I first power on the cameras, both of them rotate to the rear. It is almost as if the cameras lost power.
But I don’t have a power failure because I have a UPS that logs when the house loses power