The Tidal > „New albums“ section not updating is indeed broken since August 16. However, new albums were nevertheless ingested and one can search them in Roon. It is just that they didn’t appear in the „New albums“ recommendations. This seems to be a bug on the Tidal side. This is the issue here:
Now there is a new, temporary issue where Roon didn’t ingest any new albums from Tidal today. This is under investigation and hopefully to be fixed soon: