[Android] App using background flutter engine closes when run in release mode #109248
Description
I updated my flutter Beta from 3.1.0-9.0.pre to channel Beta 3.3+ and suddenly my app is crashing when using isolates.
Steps to Reproduce
Clone the example app below:
https://github.com/fluttercommunity/flutter_downloader
And run it on release mode
Click to download anything.
Flutter doctor:
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel unknown, 3.1.0-9.0.pre, on macOS 12.5 21G72 darwin-x64, locale en-BR)
[✓] Android toolchain - develop for Android devices (Android SDK version 32.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.2)
[✓] VS Code (version 1.70.0)
[✓] Connected device (3 available)
[✓] HTTP Host Availability