[Android] Fix SearchBar text bleeding between instances after navigation

src/Controls/tests/TestCases.HostApp/Issues/Issue20348.cs

@@ -0,0 +1,79 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 20348, "SearchBar text incorrectly copied between multiple SearchBars on Android after back navigation", PlatformAffected.Android)]
+public class Issue20348 : NavigationPage
+{
+	public Issue20348() : base(new MainPage())
+	{
+	}
+
+	public class MainPage : ContentPage
+	{
+		public MainPage()
+		{
+			SearchBar firstSearchBar = new SearchBar
+			{
+				AutomationId = "FirstSearchBar"
+			};
+
+			Label firstSearchBarTextLabel = new Label
+			{
+				AutomationId = "FirstSearchBarText",
+				Text = "Pass"
+			};
+
+			firstSearchBar.TextChanged += (s, e) =>
+			{
+				firstSearchBarTextLabel.Text = string.IsNullOrEmpty(e.NewTextValue)
+					? "Pass"
+					: "Fail";
+			};
+
+			SearchBar secondSearchBar = new SearchBar
+			{
+				AutomationId = "SecondSearchBar"
+			};
+
+			Button navigateButton = new Button
+			{
+				Text = "Navigate",
+				AutomationId = "NavigateButton"
+			};
+
+			navigateButton.Clicked += async (s, e) =>
+			{
+				await Navigation.PushAsync(new SecondPage());
+			};
+
+			Label descriptionLabel = new Label
+			{
+				Text = "Test passes if SecondSearchBar text is NOT applied to FirstSearchBar after typing in SecondSearchBar, navigating to page 2, and pressing back.",
+				FontSize = 12,
+				TextColor = Colors.Gray,
+				HorizontalTextAlignment = TextAlignment.Center
+			};
+
+			Content = new VerticalStackLayout
+			{
+				Padding = 20,
+				Spacing = 10,
+				Children = { descriptionLabel, firstSearchBar, firstSearchBarTextLabel, secondSearchBar, navigateButton }
+			};
+		}
+	}
+
+	public class SecondPage : ContentPage
+	{
+		public SecondPage()
+		{
+			Title = "Second Page";
+			Content = new Label
+			{
+				Text = "Second Page",
+				AutomationId = "SecondPageLabel",
+				HorizontalOptions = LayoutOptions.Center,
+				VerticalOptions = LayoutOptions.Center
+			};
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue20348.cs

@@ -0,0 +1,31 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue20348 : _IssuesUITest
+{
+	public override string Issue => "SearchBar text incorrectly copied between multiple SearchBars on Android after back navigation";
+
+	public Issue20348(TestDevice device) : base(device) { }
+
+	[Test]
+	[Category(UITestCategories.SearchBar)]
+	public void SearchBarTextShouldNotBleedToOtherInstances()
+	{
+		App.WaitForElement("FirstSearchBar");
+		App.WaitForElement("SecondSearchBar");
+
+		App.EnterText("SecondSearchBar", "TestText");
+		App.Tap("NavigateButton");
+
+		App.WaitForElement("SecondPageLabel");
+		this.Back();
+		App.WaitForElement("FirstSearchBarText");
+
+		var result = App.FindElement("FirstSearchBarText").GetText();
+		Assert.That(result, Is.EqualTo("Pass"),
+			"First SearchBar should be empty after back navigation — Android state save/restore should not bleed text from other SearchBar instances");
+	}
+}

src/Core/src/Platform/Android/MauiSearchView.cs

@@ -22,6 +22,16 @@ void Initialize()
 
 			_queryEditor = this.GetFirstChildOfType<EditText>();
 
+			// Disable Android's built-in instance state saving on the internal EditText
+			// to prevent query text from being incorrectly restored across multiple
+			// SearchView instances during navigation. The EditText shares a fixed
+			// resource ID (search_src_text) across all SearchViews, causing state
+			// to bleed between instances.
+			if (_queryEditor is not null)
+			{
+				_queryEditor.SaveEnabled = false;
+			}
+
 			if (_queryEditor?.LayoutParameters is LinearLayout.LayoutParams layoutParams)
 			{
 				layoutParams.Height = LinearLayout.LayoutParams.MatchParent;