iframes not working when w3tc installed

@memeworx, if you deactivate W3TC then the iframe starts appearing? Possible for you to check the source code when W3TC is activated if the iframe code is still there?

Yes, when I deactivate the W3TC then the iframes start working again.

If you go to this link, you can download the settings supplied by Avada
https://theme-fusion.com/knowledgebase/how-to-speed-up-your-site-with-w3tc-plugin/

These are the settings that are currently being used on my site.

Unfortunately it is a busy site with lots of bookings happening and the booking bar uses an iframe for the calendar popup – so I cant activate W3TC until I know how to fix this issue.

the site on which I am having the issue is ashanti.co.za