I tried this new feature when it was out. It is a great add to collections but now I see I cannot change the thumbnail for my embedded web page. When I publish the collection the thumbnail reverts to its original image (if any).
In Decembers's release notes I see this listed:
- The story thumbnail reverts to the default thumbnail when the image is deleted from the story.
Could this have anything to do with the behavior of the embed's thumbnail?