Repository: flutter
Issue: Can't drag Draggable over a WebViewWidget
Labels: framework,a: platform-views,p: webview,platform-web,package,a: mouse,has reproducible steps,P2,team-web,triaged-web,found in release: 3.16,found in release: 3.19

### Steps to reproduce

1. Install packages ~`flutter_webview` and `flutter_webview_web`~ `webview_flutter ` and `webview_flutter _web`.
2. Run the provided code sample on chrome.
3. Try to drag the red square over the white space - it should work.
4. Drag the square over WebView - this time around square stops on the edge of WebView and doesn't follow the cursor.

### Expected results

Draggable can be dragged over WebView that is below in the Stack widget.

### Actual results

Draggable stops on the edge of WebView and doesn't follow the mouse cursor. 

### Code sample

<details open><summary>Code sample</summary>

```dart
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final WebViewController _controller = WebViewController()
    ..loadRequest(
      Uri.parse('https://flutter.dev'),
    );
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        useMaterial3: true,
      ),
      home: Scaffold(
        body: Stack(
          children: [
            Center(
              child: ConstrainedBox(
                constraints: const BoxConstraints(
                  maxHeight: 500,
                  maxWidth: 500,
                ),
                child: WebViewWidget(
                  controller: _controller,
                ),
              ),
            ),
            Draggable(
              child: Container(
                width: 100,
                height: 100,
                color: Colors.red,
              ),
              feedback: Container(
                width: 100,
                height: 100,
                color: Colors.red,
              ),
            ),
          ],
        ),
      ),
    );
  }
}
```

</details>


### Screenshots or Video

<details open>
<summary>Screenshots / Video demonstration</summary>

![image](https://github.com/flutter/flutter/assets/53463658/93867179-3ca0-4b67-899b-7e9015611e8f)

</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, 3.16.7, on Microsoft Windows [Version 10.0.19045.3930], locale en-GB)
    • Flutter version 3.16.7 on channel stable at C:\Users\user\dev\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ef1af02aea (2 weeks ago), 2024-01-11 15:19:26 -0600
    • Engine revision 4a585b7929
    • Dart version 3.2.4
    • DevTools version 2.28.5

[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)      
    • Android SDK at **anonymized**
    • Platform android-33, build-tools 34.0.0
    • ANDROID_HOME = **anonymized**
    • ANDROID_SDK_ROOT = **anonymized**
    • Java binary at: **anonymized**
    • Java version OpenJDK Runtime Environment (build 17.0.7+0-b2043.56-10550314)     
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at **anonymized**

[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.4)        
    • Visual Studio at **anonymized**
    • Visual Studio Community 2022 version 17.8.34408.163
    • Windows 10 SDK version 10.0.22621.0

[√] Android Studio (version 2023.1)
    • Android Studio at **anonymized**
    • 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 17.0.7+0-b2043.56-10550314)     

[√] IntelliJ IDEA Community Edition (version 2023.3)
    • IntelliJ at **anonymized**
    • 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

[√] VS Code (version 1.85.2)
    • VS Code at **anonymized**
    • Flutter extension version 3.80.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.19045.3930]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 121.0.6167.85
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 121.0.2277.83

[√] Network resources
    • All expected network resources are available.

• No issues found!
```

</details>