Composing text display when input Chinese

[Horbin-Magician]

Description

Refer: slint-ui/slint#5982

I found that the composing text are rendered below the input box when typing Chinese.

This will only happen when you type immediately after the input box has gained focus, like:
(If you wait a while after activating the input box, the composing text will be hiden)

2024-08-30.160048.mp4

Since it doesn't always come up, I assumed it is an issue.

This issue may be caused by WM_IME_SETCONTEXT msg failing to hide composing text drawn by IME timely.

Windows version

Microsoft Windows [版本 10.0.22631.4037]

Winit version

0.30.2