Steps to Reproduce

1. Execute flutter run on any code sample (e.g. the Starter app) and launch the app on Android 12 or 13 device
2. Press system back button
3. Relaunch the app from device launcher

Expected results:

Starting with Android 12, pressing back button on launcher activities should not destroy activities. The app should stay in warm state, similar to when exiting using home button. Any other app running Android 12/13 and not overriding onBackPressed() (or overriding correctly) works like that.

See Root launcher activities are no longer finished on Back press in https://developer.android.com/about/versions/12/behavior-changes-all#back-press

Actual results:

Pressing back button destroys the app. The app shows a splashscreen on the subsequent launch and does not retain any state.

In my opinion, this degrades the user experience, comparing to other native apps.

Code sample

Any Flutter sample, e.g. flutter create xyz