Metadata- Ep thumbnails stored locally and what is in nfo

HiI have it saving the episode thumbnails locally but the nfo thumbnail property gets set to a tvdb link. The link appears valid but Kodi wont load any art work. Ideas?

Example NFO:

  <title>Baja</title>
  <season>3</season>
  <episode>10</episode>
  <aired>2015-06-03</aired>
  <plot>James and Martin head south of the border to experience the adventurous side of the Baja Peninsula. In the spirit of the Baja 1000, the wildest, most outrageous off-road race on the planet, the guys brew an equally outrageous beer, using sea urchin and peyote skins and serving it up Michelada style.</plot>
  <displayseason />
  <displayepisode />
  <thumb>http://thetvdb.com/banners/episodes/272118/5240662.jpg</thumb>
  <watched>false</watched>
</episodedetails>```

Files in that directory:
```-rwxrwxrwx  1 xxx  xxx       33882  5 Jun 02:27 Brew.Dogs.S03E10.720p.HDTV.x264-YesTV-thumb.jpg
-rwxrwxrwx  1 xxx  xxx  1107509487  4 Jun 20:44 Brew.Dogs.S03E10.720p.HDTV.x264-YesTV.mkv
-rwxrwxrwx  1 xxx  xxx         595  5 Jun 02:27 Brew.Dogs.S03E10.720p.HDTV.x264-YesTV.nfo```

Kodi won’t load data on its own if there are metadata files next to the video file, but if its not loading them it sounds like a Kodi issue (Sonarr is creating them properly).

NFO Files: http://kodi.wiki/view/NFO_files/tvepisodes