I'm using Win 10, MusicBee 3.5.8150
I noticed that, when I change the album name of music files after adding them to the inbox, it doesn't change the temp folder that the files are kept in, and the Artwork Downloader applies the new artwork to the entire folder (the album as added, before changing some album names), rather than just the applicable album. I suppose this is because the artwork system functions at a folder level.
I haven't tested whether converting the files to my preferred codec/bitrate AFTER changing the album name places them in a new temp folder in the inbox. For now, I have been waiting until I send the files to my library before running the Artwork Downloader, but I would prefer to finish prettying up the files in the inbox.