Hey Michael,
This is not an issue with X because first, the category and term descriptions are not used in the theme. You might have some customization or the description in your site is powered by a third party plugin. You need to forward this to a third party developer or the plugin developer if you’re using a plugin.
Please note that we do not have support for customization and third party plugin issues. But just to add proof that this is not an issue with X, I tried displaying the category description via a custom code and posted a shortcode in one of the categories and it works even without filtering the category_description
.
You will need to consult with a third party developer for this to maintain customizations and third party plugins in your site. That is even if you have gotten the custom code here in the forum. Custom codes you find here are only meant to be a guide.
Thank you for understanding.