Facebook and twitter embeds not carried over to IA

Hello.

I am using the standard WordPress feature of embedding social posts by pasting in their URL in my WYSIWYG editor.

WordPress produces the following code on my website:

[ Moderator note: code fixed. Please wrap code in the backtick character or use the code button. Don’t wrap it in blockquote. ]

<p>Facebook-opslag:</p>
<p><fb:post href="https://www.facebook.com/verge/posts/1089121991124143"></fb:post></p>
<p>Twitter-opslag:</p>
<div class="fitvids-video">
<div class="embed">
<blockquote class="twitter-tweet" data-width="550">
<p lang="da" dir="ltr">Vism?nd uenige om PSO-afgift <a href="https://t.co/iIR7pBgmRw">https://t.co/iIR7pBgmRw</a> <a href="https://twitter.com/hashtag/dkpol?src=hash">#dkpol</a> <a href="https://twitter.com/hashtag/dkgreen?src=hash">#dkgreen</a></p>
<p>— Altinget (@Altingetdk) <a href="https://twitter.com/Altingetdk/status/728520437643141120">May 6, 2016</a></p></blockquote>
<p><script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script></div>
</div>

In the Instant Article, however, the only thing being carried over is this:

<p>Facebook-opslag:</p><p>Twitter-opslag:</p

https://www.ads-software.com/plugins/fb-instant-articles/