https://bugs.winehq.org/show_bug.cgi?id=48151
--- Comment #2 from Timur ttyusupov@gmail.com --- This is specific to custom keyboard layouts, even if I generate them from system ones provided by Apple. When using Russian system layout - Cyrillic letters are displayed correctly.
Also if I copy Russian text from outside of wine and paste it into text field - this also works fine. So, looks like the issue is related to input and custom keyboard layouts specifically.
Can you share which command line, environment variables or config settings can I use to gather logs you are asking for?