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[web] Random images in grid of PhysicalModels are not displayed when scrolling #60460

@cbenhagen

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@cbenhagen

Using Image.network instead of ImageCard works as expected.

Maybe related to #47328?

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: ImageGrid(),
    );
  }
}

class ImageGrid extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: (MediaQuery.of(context).size.width / 180).floor(),
        childAspectRatio: 2.4,
      ),
      itemCount: 1000,
      itemBuilder: (BuildContext context, int index) {
        return ImageCard('https://picsum.photos/seed/$index/300/200');
      },
    );
  }
}

class ImageCard extends StatelessWidget {
  const ImageCard(this.url);

  final String url;

  @override
  Widget build(BuildContext context) {
    return PhysicalModel(
      color: Colors.red,
      child: Image.network(url, fit: BoxFit.cover),
    );
  }
}
[✓] Flutter (Channel master, 1.20.0-3.0.pre.78, on Mac OS X 10.15.5 19F101, locale en-CH)
    • Flutter version 1.20.0-3.0.pre.78 at /Users/ben/flutter
    • Framework revision 2962912d68 (25 hours ago), 2020-06-27 00:59:50 -0700
    • Engine revision fc0e27210c
    • Dart version 2.9.0 (build 2.9.0-19.0.dev 63cf56d925)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/ben/Library/Android/sdk
    • Platform android-29, build-tools 28.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.8.3

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 47.0.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.41.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.7.1

[✓] Connected device (3 available)
    • macOS desktop • macos      • darwin-x64     • Mac OS X 10.15.5 19F101
    • Web Server    • web-server • web-javascript • Flutter Tools
    • Chrome        • chrome     • web-javascript • Google Chrome 83.0.4103.116

• No issues found!

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P1High-priority issues at the top of the work lista: imagesLoading, displaying, rendering imagesc: regressionIt was better in the past than it is nowf: material designflutter/packages/flutter/material repository.found in release: 1.20Found to occur in 1.20frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onplatform-webWeb applications specificallywaiting for PR to land (fixed)A fix is in flight

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