I normally play on 1920x1080 fullscreen with vsync enabled on a 1920x1080 monitor at 60fps in win11, which is where I noticed the error originally. That picture showing the error was taken at 720p, showcasing the same error.
Attached interface settings.
Edit: I've just set every option to Auto to see if it forced a change and the font has returned. I'm going to go poking through the various options and see if I can re-trigger the bug.
Edit #2: It's "Interface Size: Classic" that's doing it. Interface sizes Small, Large, and Auto all have text appear.