I am trying to display an overlay that closes when the native back button is pressed (or activated by gesture).
I have a PopScope widget inside an OverlayEntry which onPopInvoked method is not being called when supposed to, but the pop event is actually happening and detected by other parent PopScopes.

showOverlay() {
  late OverlayEntry entry;
  entry = OverlayEntry(
    Material( // Also tried with scaffold and with PopScope as parent instead of child
      child: PopScope(
        onPopInvoked( // This function is never called
          print('Flutter is awesome');
          entry.remove();
        ),
        child: Text('Overlay content')
      ),
    ),
  );
}

// Obviously the actual view is bigger, tried to simplify the most
// and kept the widgets I thought were relevant or could have some effect on the overlay

Widget build(context) {
  return FutureBuilder<MyObject>(
    future: futureFunction,
    builder: (context, snashot) {
      return PopScope( // This onPopInvoked is being listened
        canPop: false, // Avoids app close, isn't blocking any child PopScope (tried and they listen)
        child: Material(
          child: Stack(
            TextButton(
              onPressed: () {
                showOverlay();
              }
              child: Text('Show overlay'),
            ),
          ),
        ),
      );
    }
  );
}

Not sure if the nested navigation has something to do with this but I have read about some problems with it, so I include it.
The problematic widget has been navigated from a splash screen, navigation being handled by this main widget. (the one that goes in runApp(MainApp()))

Route<dynamic> onGenerateRoutes(RouteSettings s) {
  return MaterialPageRoute<dynamic>(builder: (context) => ProblematicWidget(), settings: s);
}

Widget build(context) {
 return MaterialApp(
    onGenerateRoute: 
    builder: (context, child) {
      return Overlay(
        initialEntries: [
          OverlayEntry(
            builder: (context) {
              return child ?? SplashSccreen();
            }
          ),
        ]
      );
    }
  );
}

I have tried in a simple project what i want and it worked but in the real project it is not working. In the real project I tried putting the PopScope in a reasonable position in the widgets tree, then tried in any possible level to check where it works and it is definitely the OverlayEntry that blocks, or at least I know that any PopScope inside it wont listen the pop event. Tried showDialog as alternative and worked but I need it to use overlay.

Help please I’m frustrated.