Concentric Zone stopped working

Hello, for a few days, after months of correct operation, I have a zone malfunction. I have my home zone with a radius of a few tens of meters and over a city area of about 1.5 km, for a few days the “person” entities have been able to enter the city but not in the home zone. I have not updated HA, the only thing that could be updated is the app of the two smartphones. If I remove city or set it passive, home zone returns to work correctly. What may have happened? Possible solutions?
Any suggestion is welcome. Thanks