Just another +1 to the above bug, flagged by @movieboy about 2 weeks ago.
I have a site running X-Pro and I’m using a Global Block in the footer. I experienced exactly the same issue where the fonts in the global block didn’t pick up my main fonts. So I tried the fix suggested, and it worked perfectly - where you add a block of text within the main body of the page and then hide those text elements.
I can provide login details via a private note if you guys want to take a look.
Thanks
Geoff