Terminal: Chinese characters are not rendering correctly if I type above them.

[klesh]

Environment

Windows build number:  Microsoft Windows [Version 10.0.18362.239]
Windows Terminal version (if applicable):   0.2.1831.0

Steps to reproduce

1. Fire up WSL
2. Run vim
3. Enter some Chinese characters, they seems to be fine.
4. Press Esc, press o to insert a new line above
5. Start typeing some English letter...
6. And the Chinese characters become smaller than normal size...
7. If I type English letter beneath, It works OK

Expected behavior

Chinese characters should stay the same size no matter I type something above or beneath it

Actual behavior

Chinese characters turn into smaller size if I type English above the line.

[miniksa]

WELP. I'll get to this.

[skyline75489]

This is also happening in OpenConsole:

But strange enough. The stock cmd.exe on Windows 10 is good:

[zadjii-msft]

Another repro gif courtesy of @zhixiangjoy in #3812