Anyone else having this issue? When the library update is complete, it will show the new TV shows under recently added, but the thumbnails/screen grabs don't show up most of the time. I'm on 16.1 RC2, but it's been happening since at least 15.
This happens to me on basically every version of Kodi/SPMC I've used on my Shield and Nexus Player using the Confluence skin.
Sometimes the thumbnails show up in the widget, sometimes they don't.
Also if I close down Kodi completely and re-open it, that seems to fix it.
I got tired of the empty thumbnails showing for recent tv episodes on the home screen so I just changed the files so that instead of episode thumbnails, the recent episodes widget uses the tv show poster instead.
I followed this guide:
http://kodi.wiki/view/HOW-TO:Change_the_...ome_screen