I have noticed this a few times in my v13. Randomly when I am in the backoffice of my local dev environment I just can't make any calls to the DB, including saving or pulling information. If I close out of VS and relaunch and do a new bebug session it will work for one or two content changes then happen again. If I completely delete the database and restore from prod (umbraco cloud) it works fine for a random time then it does it again. Anyone seen this or have any idea why it is doing this?