Worked on improving text input reliability for AvaloniaUI/Avalonia by addressing a bug affecting Windows IME caret position tracking during preedit string composition. Using C#, Win32 API, and desktop development expertise, captured cursor position changes from the Imm32InputMethod and ensured these updates were accurately propagated to the text input client. This fix resolved issues where the caret appeared in the wrong position during IME composition, particularly for East Asian language users, leading to more predictable text insertion and fewer UI glitches. The work enhanced the overall IME experience and laid groundwork for future improvements in end-to-end IME event handling.