Repository: flutter
Issue: TextField's underline on text is misaligned on Web when using Japanese Keyboard (ATOK 2014)
Labels: a: text input,a: internationalization,platform-web,P2,team-web,triaged-web

### Is there an existing issue for this?

- [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues)
- [X] I have read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports)

### Steps to reproduce

1. Hit keyboard "a" on TextField then shows "a".
2. Turn on Japanese Input Mode of IME.
3. Hit keyboard "a" then shows "aあ". 
4. Hit keyboard "space key" then "あ" is changed to "阿"(correct) and underline is rendered at "a"(incorrect).

### Expected results

4. Hit keyboard  "space key" then "あ" is changed to "阿" and underline should be rendered at "阿".

### Actual results

4. Hit keyboard "space key" then "あ" is changed to "阿"(correct) and underline is rendered at "a"(incorrect).

This issue occurred on **Web only.**
The result is correct on Windows Application.

### Code sample

<details><summary>Code sample</summary>

```dart
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  MyApp({Key? key}) : super(key: key);

  final TextEditingController _controller = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Material(
       child: TextFormField(
         controller: _controller,
       ),
      )
    );
  }

  @override
  void dispose() {
    _controller.dispose();
  }
}
```

</details>


### Screenshots or Video

<details>
<summary>Screenshots / Video demonstration</summary>

https://github.com/flutter/flutter/assets/135512697/5e30e2d5-6c14-414f-9519-49c26579950a

</details>


### Logs

<details><summary>Logs</summary>

```console
[Paste your logs here]
```

</details>


### Flutter Doctor output

<details><summary>Doctor output</summary>

```console
[√] Flutter (Channel stable, 3.13.4, on Microsoft Windows [Version 10.0.19045.3448], locale en-US)
    • Flutter version 3.13.4 on channel stable at C:\src\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 367f9ea16b (5 days ago), 2023-09-12 23:27:53 -0500
    • Engine revision 9064459a8b
    • Dart version 3.1.2
    • DevTools version 2.25.0

[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 33.0.2) 
    • Android SDK at C:\Users\Fumitsugu\AppData\Local\Android\sdk                
    • Platform android-33-ext5, build-tools 33.0.2                               
    • Java binary at: C:\Program Files\Android\Android Studio\jbr\bin\java       
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-b2043.56-10027231)
    • All Android licenses accepted.                                             
                                                                                 
[√] Chrome - develop for the web
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe      

[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.5.1)   
    • Visual Studio at C:\Program Files\Microsoft Visual Studio\2022\Community   
    • Visual Studio Community 2022 version 17.5.33424.131
    • Windows 10 SDK version 10.0.22000.0

[√] Android Studio (version 2022.3)
    • Android Studio at C:\Program Files\Android\Android Studio
    • 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 17.0.6+0-b2043.56-10027231)

[√] VS Code (version 1.80.1)
    • VS Code at C:\Users\Fumitsugu\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.64.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.19045.3448]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 116.0.5845.190
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 117.0.2045.31

[√] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>