Quick question, I've noticed my AdSense seem to disappear from my some pages,  after a quick investigation ive notice that the script that is pasted in seems to change. is this why the advert no longer shows? i am thinking this is why. code i paste in source:- <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- footer advert -->
<ins class="adsbygoogle"
     style="display:block"
     data-ad-client="ca-pub-xxxxxxxxxx"
     data-ad-slot="xxxxxxxxxx"
     data-ad-format="auto"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script> then it seems to change to this after save <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script><!-- footer advert --><script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
  the advert seems to show for a short time maybe browser cache but then disappears? Nothing wrong with my AdSense account all authorised and working. thanks for any advise