[Bug]: Duplication of messages on Android when Share.share(fullMessage) to fb messenger app

[bubbler3]

Platform

Android 16

Plugin

share_plus

Version

^12.0.1

Flutter SDK

Flutter 3.35.7 • channel stable • https://github.com/flutter/flutter.git Framework • revision adc9010625 (4 months ago) • 2025-10-21 14:16:03 -0400 Engine • hash 6b24e1b529bc46df7ff397667502719a2a8b6b72 (revision 035316565a) (3 months ago) • 2025-10-21 14:28:01.000Z Tools • Dart 3.9.2 • DevTools 2.48.0

Steps to reproduce

1. Use following code :

`
static const String _androidStoreUrl = 'play.google.com/store/apps/details?id=com.example.toto'; //no bug is using www.google.com or some other simple urls.

static Future _shareLink(BuildContext context, String storeUrl) async {
if (_isSharing) {
print('⚠️ Partage déjà en cours');
return;
}

_isSharing = true;

try {
  final message = '''🙏 Découvre Iste, mon assistant something
  Télécharge gratuitement : \n\n''';

  final fullMessage = message + storeUrl; // doublon de message lorsque text et url envoyés ensemble
  await Share.share(fullMessage);
} finally {
  _isSharing = false;
}

}
`

Specifically on Android, sharing withing facebook messenger app, this causes duplicates (message 3 times)
On iOS it is working fine
On Android with gmail, this is working fine too.

Code Sample

Logs

No exception into the logs

Flutter Doctor

[√] Flutter (Channel stable, 3.35.7, on Microsoft Windows [version 10.0.26200.7840], locale fr-FR) [620ms]
    • Flutter version 3.35.7 on channel stable at C:\tools\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision adc9010625 (4 months ago), 2025-10-21 14:16:03 -0400
    • Engine revision 035316565a
    • Dart version 3.9.2
    • DevTools version 2.48.0
    • Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-lldb-debugging

[√] Windows Version (11 Professionnel 64-bit, 25H2, 2009) [1 852ms]

[!] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [3,0s]
    • Android SDK at C:\Users\tutu\AppData\Local\Android\Sdk
    • Emulator version 35.5.10.0 (build_id 13402964) (CL:N/A)
    • Platform android-36, build-tools 36.0.0
    • ANDROID_HOME = C:\Users\tutu\AppData\Local\Android\Sdk
    • Java binary at: C:\Program Files\Java\jdk-17\bin\java
      This JDK is specified in your Flutter configuration.
      To change the current JDK, run: `flutter config --jdk-dir="path/to/jdk"`.
    • Java version Java(TM) SE Runtime Environment (build 17.0.13+10-LTS-268)
    ! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses

[√] Chrome - develop for the web [332ms]
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop Windows apps (Visual Studio Build Tools 2019 16.11.36) [330ms]
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools
    • Visual Studio Build Tools 2019 version 16.11.34902.97
    • Windows 10 SDK version 10.0.19041.0

[√] Android Studio (version 2024.3.2) [10ms]
    • 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 21.0.6+-13368085-b895.109)

[√] VS Code (version unknown) [8ms]
    • VS Code at C:\Users\tutu\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension can be installed from:
       https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
    X Unable to determine VS Code version.

[√] Connected device (4 available) [349ms]
    • RMX2075 (mobile)  • 91f50e07 • android-arm64  • Android 12 (API 31)
    • Windows (desktop) • windows  • windows-x64    • Microsoft Windows [version 10.0.26200.7840]
    • Chrome (web)      • chrome   • web-javascript • Google Chrome 144.0.7559.97
    • Edge (web)        • edge     • web-javascript • Microsoft Edge 145.0.3800.58

[√] Network resources [457ms]
    • All expected network resources are available.

Checklist before submitting a bug

• I searched issues in this repository and couldn't find such bug/problem
• I Google'd a solution and I couldn't find it
• I searched on StackOverflow for a solution and I couldn't find it
• I read the README.md file of the plugin
• I'm using the latest version of the plugin
• All dependencies are up to date with flutter pub upgrade
• I did a flutter clean
• I tried running the example project