Cannot parse image from RSS

I’m creating an android app for my website which is WordPress. I’m having trouble parsing the post thumbnails from the RSS. I’ve tested my application with different websites and they work without a problem. For some reason it’s just WordPress websites that are causing the issue or at least my website…

I do have a img html tag within the description and content:encoded tags but I created another to parse the image easier…

<postthumb><![CDATA[<?php the_post_thumbnail(); ?>]]></postthumb>

Description tag:

<description>
 <![CDATA[
  <div>
   <a href=....<img title="..." src="....jpeg" alt="..." width="..." height="..." /></a>
  </div>
  <br/>
  ... […]
 ]]>
</description>

My RSS(WordPress) vs Random RSS(Non-WordPress)

Android App Screenshot my RSS
Android App Screenshot random RSS

Link to my RSS feed