I've been using the Apple covers for manually adding covers to my library for some time. I was very pleased to see that this plugin existed for automating it. I've been running into some problems though, and the plugin isn't nearly as consistent as I'd hoped. I'd like to thank you for developing it nonetheless.
The website I had been using for manual searching is this:
https://bendodson.com/projects/itunes-artwork-finder/
... which I assume is using the same database as this plugin, since it's iTunes/Apple?
If that is the case, then searching for "The Fifth Season" (just one example) on this website returns a high resolution cover. In Calibre the plugin doesn't return any hits from the US at all, while the UK returns a number of covers, all of them wrong.
Any idea what the issue might be?