I don't have "download only approved artwork" turned on, but Picard will not download artwork I've recently uploaded, even if it's showing up correctly in MusicBrainz. Maybe related to PICARD-570?

For instance, on this release: https://beta.musicbrainz.org/release/882d2c01-5e18-45a1-a2e9-b6b83354172d/cover-art

I get this error, and it can only give me the old Amazon artwork:
CAA JSON error: Error downloading https://ia801509.us.archive.org:443/28/items/mbid-882d2c01-5e18-45a1-a2e9-b6b83354172d/index.json - server replied: Not Found