AddToAny Share Buttons problem

I’ve installed the AddToAny Share Buttons to my wordpress based site to make it easier for readers to share content on social media. Everything works great except for the Facebook share button. Though it works flawlessly to post my story on Facebook, the thumbnail of the post that the plugin uses is my header logo and not the thumbnail of the corresponding post.

Other plugins seem to offer the same results, which leads me to believe that the plugin isn’t at fault. Please help!!!