My wife thinks I am a nerd and a knob. Not sure if i can help but…
In Foundation and / or Big White Duck stacks - there’s a setting to show custom fonts in edit mode, but it will cause this behaviour to happen.
Otherwise, this older post has some details (but it is for RW 6). Maybe a bug snuck back in. Jumping to the top of the page
Edit: @thang beat me to it. Clearly he’s nerdier and knobbier than I.