When entering html in the “Category Header” wysiwyg editor on the product category page (using Woocommerce plugin), after saving, the carats and quotes get converted to html character entities. I have verified that it doesn’t happen when the Yoast SEO plugin (3.1.2) is disabled. Since that meta box is added by the theme, I’m hoping that you will have a fix.
Also, that editor doesn’t have the “visual” editor option, only raw text… Is that right?