Asset Images not showing up in FLutter Web when doing flutter run -- release

When I was trying to execute my flutter project as

flutter run

The screenshot is the display

All the assets display as intended.

But when I use

flutter run --release

The screenshot is the display

No asset displays and blank stuff is displayed instead

I have tried most fixes already available but nothing worked so far. I have put changed the image's location to be outside the assets folder but still no luck.

Pubspec.yaml

name: portfolio
description: A new Flutter project.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev
version: 1.0.0+1
environment:
  sdk: ">=2.12.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  animated_text_kit: ^4.1.1
  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter
flutter:

  uses-material-design: true
  assets:
    - assets/
    - safar.png
    - Geoshare.png
    - sahulat.png
    - swish.png

  fonts:
    - family: Mont
      fonts:
        - asset: assets/MontserratAlternates-Light.ttf
          weight: 300
    - family: Agustina
      fonts:
        - asset: assets/Agustina.ttf

Flutter Doctor

Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
    • Flutter version 2.2.0 at C:\src\flutter
    • Framework revision b22742018b (13 days ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at C:\Users\hamas\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.2
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 4.1.0)
    • 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 1.8.0_242-release-1644-b01)

[√] VS Code (version 1.56.2)
    • VS Code at C:\Users\hamas\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.22.0

[√] Connected device (2 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 
    • Edge (web)   • edge   • web-javascript • Microsoft Edge