https://bugs.winehq.org/show_bug.cgi?id=48151
--- Comment #1 from Ken Thomases ken@codeweavers.com --- Is this specific to custom keyboard layouts, or does it also occur with the Apple-provided Russian keyboard layouts?
At first impression, it seems like it's more a display issue (the font for the control doesn't contain glyphs for the Cyrillic characters) than an input problem.
If you could gather a +key,+keyboard,+event log of typing in such a field (try not to do anything else with the keyboard for that session), that may help.