Hello,
Just to let you know, I created a Default font entry in Templates -> Fonts (only one entry). For some reason, when I go back to the page, I now have four entries with the same name “Default”. Also, the associated font (Montserrat in my case) is now reverted for all entries to Helvetica. I am pretty sure duplicating entry is not expected, even more that it does revert back to another font than the one I originally selected…
Screenshot: https://drive.google.com/file/d/0BwjZAANub4Q9b3BBVXNDNXF6YnM/view?usp=sharing