Flutter InternalLinkedHashMap cast error only when context has been restored

Question

I'm building an app in Flutter and I'm trying to allow my pages to be restorable, even though some arguments are passed to those pages.

My code:

Main:

child: MaterialApp(
  restorationScopeId: 'root_app',
  onGenerateRoute: Routes.buildRoutes(),
  title: 'My App',
  theme: ThemeData(primarySwatch: Colors.teal),
)

Routing:

static RouteFactory buildRoutes() {
  return (settings) {
    final arguments = settings.arguments != null ? settings.arguments as Map<String, dynamic> : <String, dynamic>{};
    Widget _view;

    var route = findRoute(settings.name);
    switch (route) {
      case Routes.menu:
        _view = const Menu();
        break;
      case Routes.selection:
        _view = const Page2(arguments);
        break;
      default:
        return null;
    }

    return MaterialPageRoute(
        settings: settings,
        builder: (context) => RestorationScope(restorationId: route.restorationId, child: _view),
    );
  };
}

Navigation:

onSuccess: (List<Map<String, dynamic>> evalData) =>
  Navigator.restorablePushReplacementNamed(context, widget._route.value, arguments: <String, dynamic>{'data': evalData}),

When I run the following code for the first time (not from a restoration, but by navigation) I get NO errors and my page loads normally.

When I put the app in the background (with don't keep alive) and bring it back, forcing a restoration, I get a "_InternalLinkedHashMap cast" error and the debugger data is as follows:

It's interesting to note that the data itself is pushed and works the first time, being passed by navigation. But when this data is restored (correctly according to the debugger) I get an error while trying to cast it.

I did found something similar at Github and also this is a version working thanks to this answer by @pskink

I also decided to raise an issue at Flutter's github.