when I enter a location for a picture, Photos changes it to a different location
When I enter a location for a picture, e.g. "38.007949, -122.487170" in the info panel in Photos, the location that ends up being stored is a different one, sometimes several miles away from what I enter. Every location anywhere in San Rafael, California, gets changed to the location of San Rafael City Hall. Locations in San Francisco, are changed to Twin Peaks in San Francisco.
For me, Photos started behaving this way a couple of days ago (October 2020); previously Photos would just store whatever location I entered. Is anybody else seeing this?
MacBook Pro 15″, macOS 10.15