Steps to Reproduce

Similar to #75675

1. Create new project
2. Add a TextField somewhere
3. press down right shift for 3-5 seconds.
4. now all input is stuck in "caps", until Left shift is pressed

Expected results:
RShift works
Actual results:
RShift is not working

Result of flutter doctor -v, this is master branch.
[√] Flutter (Channel master, 2.6.0-12.0.pre.269, on Microsoft Windows [Version 10.0.19042.1237], locale en-US)
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
X cmdline-tools component is missing
Run path/to/sdkmanager --install "cmdline-tools;latest"
See https://developer.android.com/studio/command-line for more details.
X Android license status unknown.
Run flutter doctor --android-licenses to accept the SDK licenses.
See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.
[√] Chrome - develop for the web
[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.8.5)