Duplicate letters composited to textbox when using chinese IME

[rabbitism]

Describe the bug

20250414-161904.mp4

To Reproduce

See screen capture.

Expected behavior

No response

Avalonia version

11.3.0-beta2

OS

Windows

Additional context

No response

[Gillibald]

Is this a recent regression?

[MrJul]

Is this a recent regression?

Yes, introduced by #18624. Fixing.