Hi Merrick,
Raw HTML addon is/was only for raw HTML code,
but if you have RSFirewall it may damage all iframe and script code used by you on the website, it's a very popular issue.
Just check RSJoomla documentation, even we mentioned about this in Helix documentation.
I am more than sure that you have this same case.
UPDATE
Checked your page sourcecode and indeed I have right.

Private advice as user of firewall, add your all IP used by you and client to RSFirewall white list and correct code.
And as I you see SP Page Builder addon is fully OK also this time.