Sharing on Facebook

When we click on the facebook share link for some of our posts, the link does not work correctly.

For one post, it will open the share box with the thumbnail, title and blurb from the post.

For other posts, it will open the share box with only the permalink for the post and no details.

I cannot figure out why one post would work and another would not.

The link to the blog is: https://www.jsgmedicalpractice.com/blog/

There are currently 3 posts in this blog. The one at the bottom of the page is the only one that is working as I expect it to. The other two seem to be working incorrectly.

In admin, our settings on the sharing tab we have Facebook enabled using the Share Button.

Any help to figure out why this isn’t working consistently would be appreciated.

Thanks

Carol