Pro Header and Pro footer seem to not work for assigning them to display anywhere. The builder works and create the header and footer but when you go out of the editor to view the page it just grabs the standard header not the Pro header. I tried setting display everywhere and it wouldn’t display anywhere. When searching I found this seemed to be an issue on some of your earlier updates to the builder in Pro 2.6 which mentions “Fix builders not working when Polylang is using a directory based URL”.
Hope makes sense didn’t think screenshots were helpful for this instance. example of url https://hosting.quentosity.co.nz/~exclusivetravelg/downunder it is using the temp cpanel url along with a directory. Oh also this is testing on Beta 3