Hi
On Divi, I got it working my disabling the fixed header in Divi.
On the Elegant Themes website, the alternative fix is to change the z-index on the WPfront container, and force the divi menu down the page a bit.
I am aware that these are not satisfactory solutions, but perhaps they will provide enough diagnostics for someone smarter/more motivated than me to find a proper fix.
Regards
Brendon Hatcher
