FreshMvvm navigation screnario

I have problem with FreshMvvm navigation.

I want navigate from page to tabbedPage as hierarchical(save upper title).

await this.CoreMethods.PushNewNavigationServiceModal(tabbedContainer); it removes title like a modal
await this.CurrentPage.Navigation.PushAsync(tabbedContainer); it add title one level highter than I want

var tabbedContainer = new FreshTabbedNavigationContainer("activityEditNavigationStack");