As reported in this thread:
https://community.metabrainz.org/t/weekly-jams-and-other-created-for-you-playlists-stuck/688969

"Created for you" playlists are stuck for a lot of people. Currently they are stuck at 9th September for a lot of people ("Deleted in 2 weeks ago"):
https://listenbrainz.org/user/Gradient/recommendations/
https://listenbrainz.org/user/db0/recommendations/
https://listenbrainz.org/user/ryankupk/recommendations/
https://listenbrainz.org/user/pygospa/recommendations/

It's possible that for new users they are stuck on the "oh no" graphic:
https://listenbrainz.org/user/Mooncake/recommendations/

Some are stuck a bit later, e.g. 16th September ("Deleted in 7 days ago"):
https://listenbrainz.org/user/aerozol/recommendations/
https://listenbrainz.org/user/RarePotato/recommendations/