Repository: flutter
Issue: Magnifier inside FittedBox doesn't work properly
Labels: framework,has reproducible steps,P2,team-text-input,triaged-text-input,found in release: 3.22,found in release: 3.23

### Steps to reproduce

1. Run the code
2. Start highlighting text on different lines

### Expected results

The magnifier should be everywhere like in the first line

### Actual results

The magnifier has a wrong position or disappears at all

### Code sample

<details open><summary>Code sample</summary>

```dart
void main() async {
   runApp(App());
}

class App extends StatelessWidget {
  const App({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Material(
        child: FittedBox(
          fit: BoxFit.fitWidth,
          child: Container(
            // change to height: 600 & width: 600 for second result
            height: 300,
            width: 300,
            child: SelectableText(
              'Hello World ' * 100,
              style: TextStyle(fontSize: 20),
            ),
          ),
        ),
      ),
    );
  }
}
```

</details>


### Screenshots or Video

<details open>
<summary>Screenshots / Video demonstration</summary>

https://github.com/flutter/flutter/assets/18518522/26f15b95-d1db-4ac2-9346-38cbad1011b0

https://github.com/flutter/flutter/assets/18518522/73bc4a78-55c6-4617-8cfc-fd5689c69e70

</details>


### Logs

<details open><summary>Logs</summary>

```console
[Paste your logs here]
```

</details>


### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
[✓] Flutter (Channel stable, 3.22.1, on macOS 14.5 23F79 darwin-arm64, locale ru-TR)
    • Flutter version 3.22.1 on channel stable at /Users/goolpe/development/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision a14f74ff3a (6 days ago), 2024-05-22 11:08:21 -0500
    • Engine revision 55eae6864b
    • Dart version 3.4.1
    • DevTools version 2.34.3

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/goolpe/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 15F31d
    • CocoaPods version 1.15.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2023.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.9+0-17.0.9b1087.7-11185874)

[✓] VS Code (version 1.89.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.88.0

[✓] Connected device (4 available)
    • Nokia 3310 (mobile)             • 00008030-001839E614B9402E • ios            • iOS 17.4.1 21E236
    • macOS (desktop)                 • macos                     • darwin-arm64   • macOS 14.5 23F79 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad     • darwin         • macOS 14.5 23F79 darwin-arm64
    • Chrome (web)                    • chrome                    • web-javascript • Google Chrome 125.0.6422.78
    ! Error: Browsing on the local area network for Kate. Ensure the device is unlocked and attached with a cable or associated with the same
      local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)

[✓] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>