example project ios stuck in launch screen

example ios project stuck on start screen without any errors
I checked it by installing a new flutter project the same problem. installing the flutter_downloader package itself leads to this issue
at the same time everything is fine with the android version
Debug console output:
Launching lib/main.dart on iPhone SE in debug mode...
Xcode build done. 16,2s
database path: ../Library/Developer/CoreSimulator/Devices/F3EA0FD9-677C-41FA-B45C-E79C06EC684D/data/Containers/Bundle/Application/0D7F48FD-43FA-4654-84FC-E843A0FAEAC2/Runner.app/FlutterDownloaderDatabase.bundle/download_tasks.sql
MAXIMUM_CONCURRENT_TASKS = 5
Connecting to VM Service at ws://127.0.0.1:55297/TzcZNJM_ns8=/ws

[✓] Flutter (Channel stable, v1.17.5, on Mac OS X 10.14.6 18G103, locale ru-UZ)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
[✓] Xcode - develop for iOS and macOS (Xcode 11.2)
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.47.3)
[✓] Connected device (2 available)

• No issues found!

on IOS 12.4 works fine but on IOS 13.2 isn't work