Sending a code-snippet with gpg-key inside confuses MailMate

I just stumbled over this, when I opened an e-mail I sent several days ago:

https://cloud.lantschner.name/index.php/s/HFLGH87B7tZkAQr

I guess, that the gpg-signature signing the XML codeblock confuses MailMate, although the whole block is inside of markdown-code tags.

Here is the whole paragraph (I can't upload/paste the whole message since some parts are confidential):

Lösung

Die Spezifikation wird um eine Liste für die Bundles erweitert:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

<?xml version="1.0" encoding="UTF-8"?>
<license>
  <product>Isilon</product>
  <type>NFR</type>
  ...  
  <tier>2</tier>
  <quantity>1</quantity>
</license>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)

iEYEARECAAYFAl2MesYACgkQMjghJ09k5bqZdwCeNPZgrnaI3jOZ0VeilOtoTtWG
7hAAn2dgV/uqasOtLPrHnP0B1Z1j52Wh
=kyOc
-----END PGP SIGNATURE-----

I think MailMate should just ignore anything inside of Markdown-code blocks.