I have 220.127.116.11 running on an Unraid server.
Ever since the update to 18.104.22.168 I am having artwork trouble with my folder movies. I don't know if it's ALL folders but I do know that all affected titles are folders. I'll give one example.
Sin City currently has Star Trek The Motion Picture thumbnail in the Emby web interface. If I update it to Sin City through Identify it will stick. However, all of my Star Trek movies (older ones only that are folders not my ISOs) flip to Sin City along with a few other folders - Superman Batman Apocolypse, Sucker Punch ...
Now if I go back and fix those I will actually get a higher percentage of accurate thumbnails - but - Sin City will eventually flip to one of the Star Trek thumbnails!
If I look at the artwork on the server - either within the Sin City folder or outside of it, all the artwork labelled Sin City is accurate and all the Star Trek artwork is accurate.
I'm very confused about all the artwork storage locations and cache options between emby and Kodi to the point I go crosseyed - I do have artwork in both locations (inside and outside the folder) and probably different locations in Kodi as well however for purposes of testing the past few days I've completely removed Kodi from the picture.