Well if someone have access to the database it usually have access to everything else anyway …
No idea how to mitigate this 
Requires backup restore of the provider to force a complete full sync.
I did upgrade navidrome between setting the artist image that did load and now trying to retrieve the ones that don’t…
Then you have your solution above Remove the provider in Symfonium and add it again.
Hmm, you can’t add a button to do a full sync?
Why would I maintain code to workaround a specific temporary issue generated by a temporary very specific update of a very specific provider ?
Everyone updating navidrome will run into it, plus if similar issues with any media provider come up then the solution will be right there
All that to have the exact same result as removing and adding the host ?
Adding the provider and then deleting the old one seemed to work pretty seamlessly