Difference in favorite album count between android and web

Hi, I have a question about the limit of albums that can be marked as favorites. It is supposed to be 2000 on web and only 1000 on android. I have 1500 marked as favorites. That's the same number I see as favorite albums both on the web and in the android app and I think I am listening them all in my mobile app when I play "shuffle my music". How is it possible? Does the mobile app only plays shuffle with 1000 even though it shows all 1500 favorites?

If so, it would make sense, but what is Deezer's criteria for cutting out those 500 extra albums? Those addded first? Those I listen less frequently? Which ones get removed from the total 1500?

Thanks a lot