Seems currently as well. Just went through an issue with timezone id not getting saved to database, which brought up an issue with google splitting the timezone api off onto its own and needed to add that to the previous list of 4 APIs to make a total of 5.
Now with the setup as described in the documentation they linked with referrer restrictions, I still can’t save timezone id to database and can’t save geographic addresses now either.
Reading through the thread you linked it seems like the culprit is the security of having referring restrictions to avoid others possibly using the api key.
So in the end, is the choice to either give up the protection of the referrer restrictions or not use the google api for timezone data and geographic addresses?