https://bugs.winehq.org/show_bug.cgi?id=42707
--- Comment #17 from winetest@luukku.com --- (In reply to Andreas Schallenberg from comment #16)
To clarify: I'm testing with plain wine (without any wrapper) with a WoWS installation with self-built wine and additionally with wine from RPMs.
Furthermore, I also test wine the releases (2.3, 2.4, 2.5 so far) with PlayOnLinux wrapper on a separate WoWS installation to make sure it's not my WoWS installation that is broken.
Your issue is most likely font related. There is bunch of libcef related bugs that seem to get fixed installing some fonts.