[Android] Fix NavigationBar overlapping StatusBar when NavigationBar visibility changes

src/Controls/src/Core/Platform/Android/Extensions/ToolbarExtensions.cs

@@ -47,6 +47,7 @@ public static void UpdateIsVisible(this AToolbar nativeToolbar, Toolbar toolbar)
 			}
 
 			nativeToolbar.LayoutParameters = lp;
+			AndroidX.Core.View.ViewCompat.RequestApplyInsets(nativeToolbar);
 		}
 
 		public static void UpdateTitleIcon(this AToolbar nativeToolbar, Toolbar toolbar)

src/Controls/tests/TestCases.HostApp/Issues/Issue33340.cs

@@ -0,0 +1,31 @@
+using Microsoft.Maui.Controls.PlatformConfiguration.AndroidSpecific;
+using TabbedPage = Microsoft.Maui.Controls.TabbedPage;
+
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 33340, "NavigationBar overlaps StatusBar in TabbedPage", PlatformAffected.Android)]
+public class Issue33340 : TabbedPage
+{
+    public Issue33340()
+    {
+        this.On<Microsoft.Maui.Controls.PlatformConfiguration.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
+        var page1 = new ContentPage { Title = "Page1", Content = new Label { Text = "Page 1" } };
+        NavigationPage.SetHasNavigationBar(page1, false);
+        Children.Add(new NavigationPage(page1) { Title = "Tab1" });
+
+        var page2 = new ContentPage { Title = "Page2", Content = new Label { Text = "Page 2" } };
+        NavigationPage.SetHasNavigationBar(page2, false);
+        Children.Add(new NavigationPage(page2) { Title = "Tab2" });
+
+        var page3 = new ContentPage { Title = "Page3", Content = new Label { Text = "Page 3" } };
+        NavigationPage.SetHasNavigationBar(page3, false);
+        Children.Add(new NavigationPage(page3) { Title = "Tab3" });
+
+        var page4 = new ContentPage { Title = "Page4", Content = new Label { Text = "Page 4 with NavigationBar" } };
+        NavigationPage.SetHasNavigationBar(page4, true);
+        Children.Add(new NavigationPage(page4) { Title = "Tab4" });
+
+        CurrentPage = Children[0];
+    }
+}
+

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue33340.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue33340 : _IssuesUITest
+{
+    public Issue33340(TestDevice testDevice) : base(testDevice)
+    {
+    }
+
+    public override string Issue => "NavigationBar overlaps StatusBar in TabbedPage";
+
+    [Test]
+    [Category(UITestCategories.TabbedPage)]
+    public void NavigationBarLayoutWithMixedHasNavigationBar()
+    {
+        App.WaitForElement("Tab4");
+        App.Tap("Tab4");
+        VerifyScreenshot();
+    }
+}