Describe the bug

ComboBox searching not works properly while using Japanese or Chinese keyboard layout. On further while using Japanese or Chinese keyboard ComboBox PreviewKeyDown does not fire. Please find the sample and video for further reference.

Sample:
ComboBox-Searching-issue.zip

Video:
ComboBox-searching-issue.zip

Steps to reproduce the bug

1. Run the sample.
2. Open ComboBox drop-down.
3. Now, type "devel" note developer item was not highlighted.

Expected behavior

ComboBox searching should works properly while using Japanese or Chinese keyboard layout

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.3.1: 1.3.230502000

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response