I have modified a javascript popup modal to work with the Simple layout. We are using the modal from https://www.jquerymodal.com.

When folks are going through and adding the HTML for the popup in page, the actual HTML attribute rel="modal:open"  and its value disappear. Multiple users have noticed this problem. Locking the question will keep the attribute but its a headache.

Has anyone experienced anything like this? Anyone have any workarounds or know what is causing it?