How to shut off Iframe Control
Using Jamroom
First, there is no need in entering any more URL's into the Allowed Domains field in the Core > Global Config section, ALLOW_ALL_DOMAINS should be all you need there and URL's are not what should be entered anyway, only domain names, ie. https://www.youtube.com should just be youtube.com.
For iframes, the domains should be added to the iframe modules Allowed Domains section. Site > IFrame Control > Allowed Domains. Note that you can't add the http or www to this section as well. Just the main domain will do.
If you can let me know where your seeing the issue, I'll check it out for you.
Thanks!