HttpOnly, secure cookie with clearCookies: false are cleared when I close the app

I'am using this package for display a website with a cookies that doesn't expire when the browser is closed (the app in this case). The cookie has httpOnly and secure flags, every time that I close the app they are cleared. I set clearCookies = false (default value) but it doesn't works

System info

Issue occurs on: Android, not tested on iOS
Plugin version: 0.3.11
Flutter doctor output:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.22.2, on Microsoft Windows [Versione 10.0.18363.1139], locale it-IT)

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[!] Android Studio (version 4.1.0)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[√] VS Code (version 1.51.0)
[!] Connected device
    ! No devices available

Comienza reproduciendo esto en Android con la versión 0.3.11 del plugin, usando una cookie HttpOnly y segura, y clearCookies=false. En el issue no se nombra ningún archivo fuente ni ninguna prueba; se considera terminado cuando se confirme que la cookie permanece después de cerrar y volver a abrir la aplicación, con cobertura de regresión si el proyecto proporciona una ubicación de prueba relevante.