BUG: adding hundreds of tracks to Favorite Tracks not working

Hi there,

I just imported 1700 tracks from a competitor into a new playlist on Deezer. Considering switching…

However, in the web app (Firefox on Ubuntu 24.04), I cannot add my tracks to "Favorite Tracks" (and it does not seem to be possible to do this on the Android app at all). Even leaving it there for an hour in case it silently processes my request (I wouldn't know...) did not yield anything: nothing is added.

What I did: went to my playlist, checked the top checkbox to select all tracks (and they are), then chose "Add to playlist > Favorite Tracks". Nothing happens. When I select a few individually and then add them in just the same way, it works.