HtmlElementView Transform Bug

main.dart

import 'dart:html';
import 'dart:ui' as ui;

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late VideoElement _videoElement;
  static const _viewType = '_videoElement_';

  @override
  void initState() {
    super.initState();
    _videoElement = VideoElement();
    ui.platformViewRegistry.registerViewFactory(
      _viewType,
      (int _) => _videoElement,
    );
    window.navigator.mediaDevices?.getUserMedia(
      <dynamic, dynamic>{'video': true},
    ).then((stream) {
      _videoElement
        ..autoplay = true
        ..muted = true
        ..srcObject = stream
        ..style.transformOrigin = ''
        ..style.transform = 'rotateY(180deg)'
        ..setAttribute('playsinline', '');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(child: HtmlElementView(viewType: _viewType)),
        floatingActionButton: FloatingActionButton(
          child: Icon(Icons.add),
          onPressed: () {},
        ),
      ),
    );
  }
}