When I share an image collection from our site to facebook - the post does not pull any image assets or even our logo into the post. When I share an article and individual images it works fine. See my screen shot of the two posts. The top is an image asset, the bottom post is a collection. We try to use collection assets throughout our site. It would be nice if the sharing of collections displayed consistently with the other types of assets.
Customer support service by UserEcho