https://bugs.winehq.org/show_bug.cgi?id=53495
--- Comment #5 from Nikolay Sivov bunglehead@gmail.com --- (In reply to Rafał Mużyło from comment #4)
Actually, go for a full font log - there's a good chance you'll see a font being selected that just doesn't have the required glyphs (bonus point if it's something like Arial).
That won't be necessary, since it's not using gdi.