How to reproduce:
1. Add an Asian language locale to your Operating System
2. Right-click on Windows taskbar and select 'Show touch keyboard button'
3. Open the attached 'project-1175807.zip' project using the EnvIronman VM (optional) (more information in Edit)
4. In the Hierarchy window select 'Main Camera'
5. In windows taskbar open Touch Keyboard
6. Try to input any digits using Asian locale into the Inspector window
-- Observe the freeze

Reproducible with: 2017.4.32f1, 2018.4.7f1, 2019.2.2f1, 2019.3.0b1, 2020.1.0a1

Notes:
1) Reproduced with Korean and Chinese locales
2) Seems to be reproducible when trying to input the characters anywhere in the Editor
3) Does not reproduce when trying to enter letter characters into Inspector window, however, it does reproduce when trying to enter letter characters into Hierarchy window