Over the last few days I have noticed that some of my databases are no longer showing in the preview portal.
They exist and are running and they appear on the current Management Portal.
Interestingly, I have tiles on the start page for all of my databases, of the 3 that are missing from the databases list that I have pinned, two of them are there but show no text where normally they would show "Running", for one of them the pinned tile has disappeared completely!