Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Assets/Scenes/StartScene.unity“ Scene
3. Enter the Play Mode
4. In the Game view, enter the Korean character "아" in the Input Field manually
5. Press the Enter key
6. Observe the Console window

Expected result: "아" message is displayed
Actual result: The empty message is displayed

Reproducible with: 2023.2.0a14, 6000.0.42f1, 6000.1.0b11, 6000.2.0a7
Not reproducible with: 2022.3.60f1, 2023.2.0a13

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: This issue does not occur when enabling “Use previous version of Microsoft IME” under Microsoft IME compatibility mode