I'm using this plugin along with NextScripts SNAP plugin which autoposts my posts to facebook. Typically SNAP displays the post on Facebook with the featured image of the post but lately it's been using thumbnails from the related posts created by this plugin.
I'm just curious if your plugin is doing anything funny with featured images that would allow SNAP to confuse the featured image of the current post with a thumbnail for a related post.
Any suggestions on what this could be? I know it could also be an issue with SNAP and I'm asking over there as well.