https://bugs.winehq.org/show_bug.cgi?id=41264
--- Comment #3 from winetest@luukku.com --- Search from list riched20 then press add and then edit and make sure the order is native builtin order or just native. Then do the same for riched32.
This should set richedit as native.
But it's easier to just do winetricks -q riched20, I dont know if this overrides riched32 too.
if you have winetricks installed.