Well, if ik go to https://liemerskunstwerk.nl/feed all content is loaded except “[CDATA[]]” by description.
I’m not sure what “custom post types” are. There are now 5 newsitems (posts) on the website
<item> <title>Hulp bij CoronaCheck app</title> <link>https://liemerskunstwerk.nl/hulp-bij-coronacheck-app/</link> <dc:creator><![CDATA[ferdi]]></dc:creator> <pubDate>Tue, 05 Oct 2021 09:36:43 +0000</pubDate> <category><![CDATA[Algemeen]]></category> <category><![CDATA[Bibliotheek]]></category> <category><![CDATA[Educatie]]></category> <category><![CDATA[Museum]]></category> <category><![CDATA[Muziekschool]]></category> <category><![CDATA[Theater]]></category> <guid isPermaLink="false">https://liemerskunstwerk.nl/?p=1493</guid> <description><![CDATA[]]></description> </item>
