Cupertino NavigationBar animation

[praven07]

Steps to Reproduce

When I updated flutter to version 1.9.1+hotfix.4. The title in the navigation bar seems to have a weird animation. You can see that in the screenshot.

1. Use flutter version v1.9.1+hotfix.4
2. I've attached some screenshots of the code

Target Platform: iOS
Target OS version/browser: iOS13
Devices: iPhone6s

Screenshots

[BondarenkoStas]

@praven07 Please do not include screenshots of code. This makes it extremely tedious to reproduce the issue, as we would have to manually transcribe your example.
Please paste the text version of your example here. Also provide your flutter doctor -v output.
Does it behave in the same way on emulator? Did you try it with android, or any not iOS13 device/emulator?

[praven07]

I checked it on different devices. It works fine on the emulator. It's just on the physical device. The device I checked on was iPhone 6s. I didn't have any issue with android devices.

Here is the code to recreate it.

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
      title: 'Flutter Demo',
      home: FirstPage(),
    );
  }
}

class FirstPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      navigationBar: CupertinoNavigationBar(
        middle: Text("First Page"),
      ),
      child: new Center(
        child: FlatButton(
          onPressed: () => Navigator.push(context, CupertinoPageRoute(builder: (context) => SecondPage())),
          child: Text("Open"),
        ),
      ),
    );
  }
}


class SecondPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoPageScaffold(
      navigationBar: CupertinoNavigationBar(
        middle: Text("Second Page"),
      ),
      child: new Container(),
    );
  }
}

flutter doctor -v output

[✓] Flutter (Channel stable, v1.9.1+hotfix.4, on Mac OS X 10.14.6 18G84, locale en-US)
    • Flutter version 1.9.1+hotfix.4 at /Users/boldpalette/Applications/flutter
    • Framework revision cc949a8e8b (3 weeks ago), 2019-09-27 15:04:59 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/boldpalette/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.1, Build version 11A1027
    • CocoaPods version 1.7.5

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 40.2.2
    • Dart plugin version 191.8423
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[!] IntelliJ IDEA Ultimate Edition (version 2019.2.3)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • For information about installing plugins, see
      https://flutter.dev/intellij-setup/#installing-the-plugins

[✓] VS Code (version 1.30.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 2.25.1

[praven07]

@BondarenkoStas Hi, is there any update on the fix?

[dim971]

I'm having the same weird animation with version 1.9.1+hotfix.6