If like me you are using Equation editor for WordPress to display nice equation on your site and you also happen to use Role editor for WordPress you might face an issue on limiting role access to content creators.
In my case I allow my contributors to add, edit and publish content on pages and posts and on Learndash custom posts. But when the contributor publish or save his page/post the equation won’t display on the front-end.
I started looking for Equation editor rules in the Contributor profile in User Role editor, but couldn’t find anything.
Then I started testing each rule. To solve this problem you have to check the unfiletred_html option to allow contributors to insert equations and save them to database.