[Android] Avoid double event subscribes in gesture manager

src/Controls/src/Core/Platform/GestureManager/GesturePlatformManager.Android.cs

@@ -207,11 +207,10 @@ void SetupGestures()
 				shouldAddTouchEvent = true;
 			}
 
-			if (!shouldAddTouchEvent)
-			{
-				platformView.Touch -= OnPlatformViewTouched;
-			}
-			else
+			// Always unsubscribe first to avoid duplicates
+			platformView.Touch -= OnPlatformViewTouched;
+
+			if (shouldAddTouchEvent)
 			{
 				platformView.Touch += OnPlatformViewTouched;
 			}

src/Controls/tests/TestCases.HostApp/Elements/DynamicTapGestureGallery.cs

@@ -0,0 +1,42 @@
+namespace Maui.Controls.Sample
+{
+	public class DynamicTapGestureGallery : Microsoft.Maui.Controls.ContentView
+	{
+		public DynamicTapGestureGallery()
+		{
+			AutomationId = nameof(DynamicTapGestureGallery);
+
+			var layout = new VerticalStackLayout { Margin = 10, Spacing = 10 };
+
+			var singleTapResults = new Label { AutomationId = "DynamicTapGestureResults", Text = "0" };
+			var singleTapSurface = new Grid()
+			{
+				HeightRequest = 100,
+				WidthRequest = 200,
+				BackgroundColor = Microsoft.Maui.Graphics.Colors.AliceBlue,
+				Children = { new Label { Text = "DynamicTapSurface", AutomationId = "DynamicTapSurface" } }
+			};
+
+			var tapCount = 0;
+
+			var singleTapRecognizer = new TapGestureRecognizer();
+			singleTapRecognizer.Tapped += (sender, args) => {
+				tapCount++;
+				singleTapResults.Text = tapCount.ToString();
+
+				var dynamicTapRecognizer = new TapGestureRecognizer();
+				dynamicTapRecognizer.Tapped += (sender, args) =>
+				{
+					Console.WriteLine("DynamicTap"); 
+				};
+				singleTapSurface.GestureRecognizers.Add(dynamicTapRecognizer);
+			};
+			singleTapSurface.GestureRecognizers.Add(singleTapRecognizer);
+
+			layout.Add(singleTapSurface);
+			layout.Add(singleTapResults);
+
+			Content = layout;
+		}
+	}
+}

src/Controls/tests/TestCases.HostApp/Elements/GestureRecognizerGallery.cs

@@ -12,6 +12,7 @@ public GestureRecognizerGallery()
 			Add(new PointerGestureRecognizerEvents());
 			Add(new DoubleTapGallery());
 			Add(new SingleTapGallery());
+			Add(new DynamicTapGestureGallery());
 		}
 	}
 }

src/Controls/tests/TestCases.Shared.Tests/Tests/GestureRecognizerUITests.cs

@@ -82,5 +82,30 @@ public void DisabledSingleTap()
 			var result = App.FindElement("DisabledTapGestureResults").GetText();
 			ClassicAssert.AreNotEqual("Failed", result);
 		}
+
+		[Test]
+		[Category(UITestCategories.Gestures)]
+		public void DynamicallyAddedTapGesturesDontCauseMultipleTapEvents()
+		{
+			App.WaitForElement("TargetView");
+			App.EnterText("TargetView", "DynamicTapGestureGallery");
+			App.Tap("GoButton");
+
+			App.WaitForElement("DynamicTapSurface");
+			App.Tap("DynamicTapSurface");
+			App.Tap("DynamicTapSurface");
+			App.Tap("DynamicTapSurface");
+
+			var result = App.FindElement("DynamicTapGestureResults").GetText();
+
+			if (int.TryParse(result, out var resultInt))
+			{
+				ClassicAssert.AreEqual(3, resultInt);
+			}
+			else
+			{
+				ClassicAssert.Fail("Failed to parse result as int");
+			}
+		}
 	}
 }