title: Facebook debugger tool shows correct tags, sharebutton generates different result
body: <p>I have set my og tags as I should. Facebook debugger tool shows the correct tags and generates the correct share preview. However the sharebutton on my site generates a different result. It adds an h2 header tag with the title and there is no summary.</p>
  
  <p>My code:</p>
  
  <pre><code>&lt;meta property="og:title" content="Page-Title"/&gt; 
  &lt;meta property="og:url" content="Page-URL"/&gt; 
  &lt;meta property="og:image" content="Page-Image"/&gt;
  &lt;meta property="og:description" content="Page-Description" /&gt;
  </code></pre>
  
  <p>Initializing facebook share button</p>
  
  <pre><code>window.fbAsyncInit = function() {
    FB.init({
      xfbml      : true,
      version    : 'v2.5'   
    });
  };
  (function(d, s, id){
     var js, fjs = d.getElementsByTagName(s)[0];
     if (d.getElementById(id)) {return;}
     js = d.createElement(s); js.id = id;
     js.src = "//connect.facebook.net/en_US/sdk.js";
     fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));
  </code></pre>