The issue you have has nothing to do with Ad Inserter.
It inserts the codes into the content as configured.
However, something removes script tags from the content.
For block 3:
<div class='code-block code-block-3' style='margin: 8px auto; text-align: center; display: block; clear: both;'>
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- Paragraph Mobi -->
<ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-7840641255180449"
data-ad-slot="8925818277"
data-ad-format="auto"
data-full-width-responsive="true"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script></div>
Maybe some security setting on the server.
I would suggest to contact your hosting company.