back button missing on relative beamers example

[chirastefan]

Describe the bug
I'm implementing bloc with beamer and i need a bloc to be available to multiple pages. I found the example with multiple beamers and relative beamers and I mange to implement something working, but when navigating to the

Beamer version: 1.7.0

Expected behavior
Back button to be shown.

Screenshots
If applicable, add screenshots to help explain your problem.

Smartphone (please complete the following information):

• Device: iphone 16 pro max simulator

MaterialApp.router(
            routerDelegate: rootRouterDelegate,
            routeInformationParser: BeamerParser(),
            backButtonDispatcher: BeamerBackButtonDispatcher(delegate: rootRouterDelegate),
          )

final _bookRouterDelegate = BeamerDelegate(
  updateParent: false,
  locationBuilder:
      RoutesLocationBuilder(
        routes: {
          '/books/:bookId/details':
              (context, state, _) => const LayoutWrapper(childWidget: BookDetailsScreen()),
          '/books/:bookId/buy':
              (context, state, _) => const LayoutWrapper(childWidget: BuyBookScreen()),
          '/books/:bookId/reviews':
              (context, state, _) =>
                  const LayoutWrapper(childWidget: ReviewsScreen()),
        },
      ).call,
);

final rootRouterDelegate = BeamerDelegate(
  notFoundRedirectNamed: '/',
  locationBuilder:
      RoutesLocationBuilder(
        routes: {
          '/':
              (context, state, data) => const BeamPage(
                key: ValueKey('home'),
                title: 'Home',
                child: LayoutWrapper(childWidget: HomeScreen()),
              ),
          '/books/:bookId/*':
              (context, state, _) => BeamPage(
                key: const ValueKey('id/x'),
                child: BlocProvider(
                  create: (_) => di<BookBloc>(),
                  child: Beamer(routerDelegate: _bookRouterDelegate),
                ),
              ),
        },
      ).call,
);

navigation to the route

onTap:
                    () => Beamer.of(context).beamToNamed('/books/someBookId/details', beamBackOnPop: true),