https://bugs.winehq.org/show_bug.cgi?id=55027
--- Comment #11 from Masahito S. firelzrd@gmail.com --- Created attachment 74603 --> https://bugs.winehq.org/attachment.cgi?id=74603 imm32: When IME composition is done, send WM_IME_COMPOSITION for the composition text before sending it for the result text
Could you please try this one? This fix worked for me, so far this issue happens at 0% chance. It applies on fresh 8.10.