Importing .obj file of ~500Mb in size freezes when using operating system in some non English language keyboard

Steps to reproduce:
1. Open the attached project
2. Go to "Assets" > "Test" > "Test" > "Test" in the Project window
3. Right-click a .obj file and select Reimport

Expected results: file is imported in about 5 minutes
Actual result: file import never finishes

Reproducible with: 2018.4.33f1, 2019.4.23f1, 2020.3.3f1, 2021.2.0a11

Notes:

• To reproduce the issue you may need to reimport multiple times (reproduces inconsistently), should not take more than 5 reimports to reproduce
• Tested and reproduced using Russian, Deutsch (Deutschland), and Chinese language keyboards
• Tested but could not reproduce using Lithuanian, English (United States) language keyboards
• Same file in .fbx format imports in less than 5 minutes
• Only reproduce when importing to a subfolder of Assets (reproduces when importing to "Assets\\test
  ", does not reproduce when importing to "Assets
  ")
• Sometimes import may finish after about 0.5-1 hour (In versions where it does not reproduce import of the same file takes only about 2 minutes)
• Tested with other similar size .obj file, import took only about 2 minutes