How to reproduce:
1. Open the attached project "IMETest.zip"
2. Build And Run the project for UWP
3. Select Text Field in the middle of the Player
4. Switch language to Japanese
5. Switch Input Mode to Full-width Katakana
6. Press and hold "A" on the keyboard
Expected results: The Player does not crash
Actual results: The Player crashes
Reproducible with: 1.2.0, 1.3.0 (2019.4.37f1, 2020.3.32f1, 2021.2.19f1, 2022.1.0b15, 2022.2.0a9)