Some keys like "[" (left bracket) still not working in terminal (German keyboard layout)

I had raised this issue before in #140263 (which is now locked, preventing the natural communication channel) and it had been marked as a duplicate of https://github.com/microsoft/vscode/issues/133597, which is not quite accurate, because at least the way the issue manifests itself is different.

The issue had been closed with a note that it should be fixed in the first week of February. However the issue still isn't solved. Since this issue massively impacts the productivity in the terminal, I wish this issue can really be fixed. Either the fix had never been included in a release, or there is another regression leading to the broken behavior.

• VS Code Version: 1.65.2
• OS Version: Windows 10 Enterprise (build 19042.1526)

Detailed VSCode version:

Version: 1.65.2 (user setup)
Commit: c722ca6c7eed3d7987c0d5c3df5c45f6b15e77d1
Date: 2022-03-10T14:33:55.248Z
Electron: 13.5.2
Chromium: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Windows_NT x64 10.0.19042

Steps to Reproduce:

1. Open the terminal in VSCode with a German Keyboard Layout
2. Try typing keys like "[" (which is <AltGr> + 8 on a German keyboard). It is not working at all.