IssueTracker

Thanks for reporting!

After reading the github link, I have to say that this is working as intended.

The reason being that if the request with component filtering has partial matches in the results, it will contain a "partial_match" field that is set to true.
If it doesn't, then it would be an exact match.

Sample
Exact match (without "partial_match") :
https://maps.googleapis.com/maps/api/geocode/json?address=high+st+hasting&components=country:GB&key=YOUR_KEY

Partial Match (with "partial_match") :
https://maps.googleapis.com/maps/api/geocode/json?address=high+st+hasting&components=country:AU|country:GB&key=YOUR_KEY

Sorry, but your own FAQ literally says "where country=GB AND country=AU, and returns ZERO_RESULTS". It returns 2 results.
https://developers.google.com/maps/documentation/geocoding/intro
I understand that maybe this changed at some point in time, but is not relected in the FAQ.

And why does this return Germany?
https://maps.googleapis.com/maps/api/geocode/json?address=Berlin&key=XXX&components=country:XX|country:XY

But this does not return Germany in the results?
https://maps.googleapis.com/maps/api/geocode/json?address=Berlin&key=XXX&components=country:XX

It is really hard to follow from a developers perspetive why off-matches are acceptable as soon as I have 2 components but not when I have one component. Espacially if the partial match is not even a part of the component and if the query is dynamically generated, sometimes with one and sometimes with two components.