Photo location name info not shown after import
My iPhone shows the location name when viewed in the Photos app on the phone. The photo was taken in the last week. After I import the photo into the Photos app on Monterey the location name is missing. The Photos info window on Monterey shows "Looking up location info..." and there is a pin with the location on the map. The photo format is heif.
Looking back through slightly older photos I see the location name for photos taken in June 2021 after import.
I am currently using iOS 15.1.1 on iPhone 12 and macOS 12.0.1 on MacBook Air (2018).
Any ideas why the location name is lost after import? Is the location name in the metadata? Is Photos working out a name based on a coordinate in the metadata?