I have a Wordpress blog. I have tested three different ways (three plugins) that adds Open Graph tags to each my post. I have browsed source of my page many times. Everthing seems fine. Example:
<!-- Jetpack Open Graph Tags -->
<meta property="og:type" content="article" />
<meta property="og:title" content="Some Title" />
<meta property="og:url" content="http://blog.com/some-title/" />
<meta property="og:description" content="Some Description" />
<meta property="article:published_time" content="2011-06-06T09:19:45+00:00" />
<meta property="article:modified_time" content="2015-09-15T10:31:57+00:00" />
<meta property="og:site_name" content="blog.com" />
<meta property="og:image" content="http://blog.com/files/2011/06/Rees.jpg" />
<meta property="og:image:width" content="1024" />
<meta property="og:image:height" content="650" />
<meta name="twitter:image" content="http://blog.com/files/2011/06/Rees.jpg?w=640" />
<meta name="twitter:card" content="summary_large_image" />
And... nothing. No matter, what I try to do, Facebook keeps displaying only title and description and there is no way I can force it to display image along with it.
Is there anything, I'm doing wrong or missing something?
EDIT: This is specific to a particular blog and to Facebook only. I can share the very same blog post on Twitter or Google+ and -- of course -- image appears. I can post a link from any other blog and it -- again -- works fine and appears on Facebook with proper image.