Incorrect postal code: Herrsching am Ammersee, Germany

[JulianFl]

I have a problem with an incorrect postal code:

Country: Germany
Location: Herrsching am Ammersee
Latitude: 48.00276153295002
Longitude: 11.17008090019226

Nominatim returns the correct postal code (82211) while Photon returns the incorrect postal code (82237).
In this issue the basis in Nominatim was already wrong. In my case it is true for Nominatim and wrong for Photon.

[lonvia]

You do what kind of search? Searching for Herrsching am Ammersee returns the right postal code.

[JulianFl]

For example this one:
Bahnhofstraße Herrsching

[lonvia]

Looks like Nominatim and Photon have different assumptions what the computed postcode is and how to handle postcode boundaries.

Nominatim ignores the computed postcode for this way and just uses the postcode from the boundary relation: https://nominatim.openstreetmap.org/ui/details.html?osmtype=W&osmid=222883869

Photon ignores the relation and just uses the computed postcode.

I need to figure out who is doing it right.

[lonvia]

Note to self, the correct order for determining the postcode is:

1. addr:postcode tag on the object
2. postcode from a postcode relation
3. computed postcode