New cards are not added to deck

I subscribed to a collaborative Deck via Ankihub and logged in via the Add-On. My problem is, that cards, which other users add to the deck via AnkiHub, are not added to my deck on the desktop app. If I sync with Anki Hub, it says “AnkiHub: No new updates” although I know that there are cards missing.
Any suggestions?

Could you let us know which deck is this?

Also, are the new card suggestions being accepted on AnkiHub?