Random Exporting Thumbs

Kodi v21 has begun randomly exporting -thumb files for some movies in my library. I use The Universal Movie Scraper and have no artwork selections checked as I curate all artwork myself. I can’t find another setting for thumbs and can’t understand why Kodi is suddenly exporting these files for some but not all media. I don’t use thumbs for movies and don’t need the files in the local folders for any reason. I’ve already gone through all my rives to delete what had been exported but Kodi has now exported even more and I am just confused.