[BUG]TagExtension targeting div tags causes content skipping

[tjkh]

Describe the bug:

I'm using flutter_html 3.0.0 and encountering an issue where using a TagExtension to target div tags causes content before the div to be skipped and not rendered.

Description of the Issue:

When I define a TagExtension that targets div tags (specifically, div tags with a certain class), the Html widget fails to render any content that appears before the targeted div in the HTML source.

HTML to reproduce the issue:

Html widget configuration:

Create a new Flutter project.
Add the flutter_html dependency to your pubspec.yaml.
Use the following minimal code to reproduce the issue:

import 'package:flutter/material.dart';
import 'package:flutter_html/flutter_html.dart';
import 'package:html/dom.dart' as dom;

void main() {
runApp(MyApp());
}

class MyApp extends StatelessWidget {
@OverRide
Widget build(BuildContext context) {
String htmlContent = """

This is the passage content.

Hover over meTooltip text

""";

return MaterialApp(
  home: Scaffold(
    appBar: AppBar(title: Text('flutter_html Bug')),
    body: Center(
      child: Html(
        data: htmlContent,
        extensions: [TooltipTagExtension()],
      ),
    ),
  ),
);

}
}

class TooltipTagExtension extends TagExtension {
TooltipTagExtension()
: super(
tagsToExtend: {'div'},
builder: (context) {
final element = context.styledElement?.element;
//debugPrint("Element TagName: ${element?.localName} classes: ${element?.classes}");
if (element != null && element.classes.contains('tooltip')) {
return Text("Tooltip Placeholder"); // This line causes passage content above to disappear
}
return SizedBox.shrink();
},
);
}
Run the app. Observe that "This is the passage content." is not rendered. If you comment out extensions: [TooltipTagExtension()] the passage content appears. Also, if you change the tag from div to a custom tag (like ), the passage content appears.

Expected behavior:

Expected Behavior:

The Html widget should render all content in the HTML, regardless of the presence of a TagExtension. The TagExtension should only affect the rendering of the specific tag it's targeting.

Actual Behavior:

Content before the targeted div tag is not rendered when the TagExtension is enabled.

Screenshots:

Device details and Flutter/Dart/flutter_html versions:

Windows 11.0
Kotlin plugin: K2 mode
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 2048M
Cores: 8
Registry:
ide.experimental.ui=true
com.android.studio.ml.activeModel=com.android.studio.ml.AidaModel
Non-Bundled Plugins:
Dart (251.27623.5)
io.flutter (87.1)

Stacktrace/Logcat

Additional info:

A picture of a cute animal (not mandatory but encouraged)