There used to be Retry buttons on error dialogs when looking up tag sources like MusicBrainz. It was even expanded to an additional retry button here: Add retry button to 'Tag Sources' error dialog
Now the retry buttons seem to be gone? If they were removed to reduce rate limiting issues, this actually may have the opposite effect... When the first API call to get search results succeeds, and the second to get album information fails, not having a retry button means you have to make that first API call again a second time.
An automatic retry after a few seconds would be helpful too.