Since you seem a bit more familiar with the local data. Could you do us a favor and check https://wambachers-osm.website/boundaries/
and see if their data is up-to-date?
That's our source for polygon data. Sadly it hasn't been updated since 18th of January though. We are also waiting on data for Norway. Also several merges.
A more direct answer to the question itself is that data such as this will be updated when:
1) We are notified about changes (which you just did).
2) Data in OSM is updated. That's our source for almost all countries at least.
3) The data has been imported in https://wambachers-osm.website/boundaries/
. This have only taken a few days before, we are not sure why there is a delay this year. We have been trying to contact the owner, but this far without success.