Broken keyboard hide logic on back button click #69886
Description
After typing some text in textbox and trying to tap back on navigation bar keyboard not hiding.
flutter doctor:
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel master, 1.24.0-8.0.pre.97, on Microsoft Windows [Version 10.0.19041.572], locale ru-RU)
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[√] Android Studio (version 3.5)
[√] VS Code (version 1.50.1)
[√] Connected device (1 available)
• No issues found!
Checked by reseting to commits on flutter master branch and looks like broken after 4bd89b3
And after reverting that commit by @jonahwilliams in ef4ec09 all works as before