electron: Won't fire keydown event when an input session starting with Sogou IME

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Issue Details

• Electron Version:
  • 11.0.0-beta1
• Operating System:
  • Windows 10 (18363.1379)
• Last Known Working Electron version:
  • 10.4.0

Expected Behavior

Some events like input,keydown,keyup,compositionstart,compositionupdate,compositionend would be fired correctly.

Actual Behavior

Some input IMEs like Sogou Pinyin would never trigger the event like keydown when they are inputing.

To Reproduce

for windows:

1. download the Sogou IME installer from https://pinyin.sogou.com/
2. try to input Chinese words or Japanese words in integrated terminal of vscode

Screenshots

Additional Information