Catchbox Pro and Formidable Forms Bootstrap Modal Popup conflict

I am experiencing a conflict with the theme and Formidable Forms Bootstrap Modal Popup. https://formidableforms.com/knowledgebase/bootstrap-modal/ For some reason CatchBox Pro disables the ability to use Header Tags < h1 > < h2 > etc. The tags for < strong > and < i > still work in the popup modal. All the tags still work in normal pages. Any ideas how I can resolve this. I would rather not use another theme, but a default theme does not have this issue. Thanx Andrew