Blank Font Characters in Certain Windows / Menus

Ran a full system update 3-4 days ago, and since then certain menus will display blank characters.

I would show you the problem visually but I am not allowed to post media or links so I guess I just have to describe it.

All the text on in a menu or window will be [ ] [ ] [ ] [ ] instead of rendered characters. Most prominently this occurs when I load the file save menu trying to save a file from Firefox.

The same occurs when I right click on the Discord menu time in the task bar. None of the standard XCFE applet menus have this menu, and Thunar looks fine.

How do I fix this?