SavedStateHandle doesn't contain navigation arguments

Question

I'm trying to inject SavedStateHandle. I am using Koin, Jetpack Compose and Navigation. I've managed to make it work, but I think it's not the right instance (I don't get my values).

This is what I do so far:

Setting the argument:

private fun NavGraphBuilder.addDetails(
    navController: NavHostController,
    root: Screen
) {
    composable(route = LeafScreen.Details.createRoute(root),
        arguments = listOf(
            navArgument("showId") { type = NavType.LongType }
        )) {
        DetailsScreen(navigateUp = navController::navigateUp)
    }
}

Defining my ViewModel:

internal class DetailsViewModel(
    val handle: SavedStateHandle,
    private val getMovieDetailsUseCase: GetMovieDetailsUseCase
) : ViewModel() 

Defining my composable:

@Composable
fun DetailsScreen(
    navigateUp: () -> Unit
) {
    DetailsScreen(
        viewModel = getStateViewModel(),
        navigateUp = navigateUp,
    )
}

And my modules:

val uiDetailsModules = module {
    viewModelOf(::DetailsViewModel)
}

It runs but showId from val showId = handle.get<Long>("showId") is null.