[rmrector]

@TCCalvin The version of Kodi Leia you are using is too old (over a year). Upgrade to a more recently nightly and you should be golden.

@curael Artwork Beef doesn't scrape thumbs at all, it either leaves them as is or replaces them. I took a look through the add-on settings and it looks like it wouldn't replace them if no episode artwork is set under "Automatically add these artwork types from web services and file system". This shouldn't happen, I will work on a fix for the next update. In the meantime, you can add "thumb" to the option "Additional art types for TV episodes (comma separated)".