Sometimes got issue when loading Facebook sdk

Facebook-sdk-issue.md

I'm using bellow code, works well!

<script src="//connect.facebook.net/zh_TW/sdk.js#xfbml=1&version=v2.8"></script>

using above code instead of Facebook share-button step 2:

<div id="fb-root"></div>
<script>(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/zh_TW/sdk.js#xfbml=1&version=v2.8";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>