I was away for a few days and I see you already fixed this issue. Dev worked for me. I have removed my temporary CSS and everything is working again. Thank you!
The website in question is currently in development, so it's behind passwords. I took a snapshot of the pre and post-updated versions of this 1 issue. I'm also getting other CSS issues (like the text/title of image overlays are stuck to the left of the image now instead of centered like they were pre-update). I'll post those issues if required in a separate tickets.
For this issue, here are the side-by-sides.
I believe this to be a legitimate issue. I have just forked my development website and updated core and modules. I have two identical sites running, minus updates, and 1.0.12 shows fonts correctly while 1.0.13 does not. It looks like the CSS has changed between versions and is breaking this feature.
Temporarily, to keep using 1.0.13 instead of rolling back I have just added additional CSS of my own that I can remove when this gets fixed in a future update.