[Android] NavigationBar overlaps with StatusBar when mixing HasNavigationBar=true/false in TabbedPage on Android 15 (API 35)

[muak]

Description

When using a TabbedPage with multiple NavigationPage children where some tabs have NavigationPage.HasNavigationBar="false" and others have NavigationPage.HasNavigationBar="true", the NavigationBar on the true tab overlaps with the StatusBar on initial display (Android 15, API 35).

The issue occurs when:

1. The tab with HasNavigationBar="true" is not the initially selected tab
2. User switches to that tab for the first time after app launch

The NavigationBar renders correctly after:

• Switching to another tab and back
• Navigating to another page and back

Steps to Reproduce

1. Create a TabbedPage with 4 NavigationPage children
2. Set HasNavigationBar="false" on Tab 1-3
3. Set HasNavigationBar="true" on Tab 4
4. Set Tab 1 as the initial CurrentPage
5. Run on Android 15 (API 35) device
6. Switch to Tab 4

Expected Behavior

The NavigationBar on Tab 4 should be positioned below the StatusBar with proper spacing.

Actual Behavior

The NavigationBar overlaps with the StatusBar. The content appears to render behind/under the StatusBar area.

Environment

• .NET MAUI 10.0.x
• Android 15 (API 35)
• Device: Physical device

Reproduction Code

App.xaml.cs

using Microsoft.Maui.Controls.PlatformConfiguration.AndroidSpecific;
using Platform = Microsoft.Maui.Controls.PlatformConfiguration;
using TabbedPage = Microsoft.Maui.Controls.TabbedPage;

namespace SampleApp;

public partial class App : Application
{
    public App()
    {
        InitializeComponent();
    }

    protected override Window CreateWindow(IActivationState? activationState)
    {
        var tabbedPage = CreateTabbedPage();
        return new Window(tabbedPage);
    }

    private TabbedPage CreateTabbedPage()
    {
        var tabbedPage = new TabbedPage();
        tabbedPage.On<Platform.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);

        // Tab1-3: NavigationBar=false
        var page1 = new ContentPage { Title = "Page1", Content = new Label { Text = "Page 1" } };
        NavigationPage.SetHasNavigationBar(page1, false);
        tabbedPage.Children.Add(new NavigationPage(page1) { Title = "Tab1" });

        var page2 = new ContentPage { Title = "Page2", Content = new Label { Text = "Page 2" } };
        NavigationPage.SetHasNavigationBar(page2, false);
        tabbedPage.Children.Add(new NavigationPage(page2) { Title = "Tab2" });

        var page3 = new ContentPage { Title = "Page3", Content = new Label { Text = "Page 3" } };
        NavigationPage.SetHasNavigationBar(page3, false);
        tabbedPage.Children.Add(new NavigationPage(page3) { Title = "Tab3" });

        // Tab4: NavigationBar=true (this tab has the issue)
        var page4 = new ContentPage { Title = "Page4", Content = new Label { Text = "Page 4 with NavigationBar" } };
        NavigationPage.SetHasNavigationBar(page4, true);
        tabbedPage.Children.Add(new NavigationPage(page4) { Title = "Tab4" });

        tabbedPage.CurrentPage = tabbedPage.Children[0];
        return tabbedPage;
    }
}

Related Issues

• [Android] NavigationPage.HasNavigationBar="False" doesn't work with TabbedPage #16816 - NavigationPage.HasNavigationBar not working correctly in TabbedPage (Android)
• [Android] Apps compiled for 15.0 / 35 default displaying as Edge to Edge #24742 - Edge-to-Edge issues on Android 15

Additional Context

This issue appeared after upgrading to MAUI 10 / .NET 10. It did not occur in MAUI 9 / .NET 9.

The problem seems related to how inactive tabs initialize their NavigationBar/Toolbar when HasNavigationBar settings are mixed within a TabbedPage.

[HarishKumarSF4517]

This issue has been validated in Visual Studio Code 1.107.1 with MAUI versions (9.0.120, 10.0.0-preview.1, 10.0.0-rc.2, 10.0.10 & 10.0.20). It can be reproducible from 10.0.0-preview.1 on Android platform and was not reproducible in 9.0.120 version. I have attached SampleApp.zip and the output for reference:

.net 9(Issue not reproduced)	.net 10(Issue reproduced)

[sheiksyedm]

Regression PR : #27294