Revert "[Android, iOS] Throw exceptions consistently for invalid StaticResource references to prevent relaunch crashes (#33859)"

src/Controls/src/Xaml/ApplyPropertiesVisitor.cs

@@ -281,15 +281,6 @@ void ProvideValue(ref object value, ElementNode node, object source, XmlName pro
 			}
 			catch (Exception e)
 			{
-				// StaticResourceExtension must always rethrow even when a handler is present —
-				// unlike other markup extensions, swallowing this exception would silently apply
-				// an invalid value to the property. Notify the handler first to log the error.
-				if (markupExtension is StaticResourceExtension)
-				{
-					Context.ExceptionHandler?.Invoke(e);
-					throw;
-				}
-
 				if (Context.ExceptionHandler != null)
 					Context.ExceptionHandler(e);
 				else

src/Controls/src/Xaml/MarkupExtensions/StaticResourceExtension.cs

@@ -30,15 +30,16 @@ public object ProvideValue(IServiceProvider serviceProvider)
 				&& !TryGetApplicationLevelResource(Key, out resource, out resourceDictionary))
 			{
 				var xmlLineInfo = serviceProvider.GetService(typeof(IXmlLineInfoProvider)) is IXmlLineInfoProvider xmlLineInfoProvider ? xmlLineInfoProvider.XmlLineInfo : null;
-				var ex = new XamlParseException($"StaticResource not found for key {Key}", xmlLineInfo);
 				if (Controls.Internals.ResourceLoader.ExceptionHandler2 is var ehandler && ehandler != null)
 				{
+					var ex = new XamlParseException($"StaticResource not found for key {Key}", xmlLineInfo);
 					var rootObjectProvider = (IRootObjectProvider)serviceProvider.GetService(typeof(IRootObjectProvider));
 					var root = rootObjectProvider.RootObject;
 					ehandler.Invoke((ex, XamlFilePathAttribute.GetFilePathForObject(root)));
+					return null;
 				}
-				// Throw an exception when the key is not found
-				throw ex;
+				else
+					throw new XamlParseException($"StaticResource not found for key {Key}", xmlLineInfo);
 			}
 
 			Diagnostics.ResourceDictionaryDiagnostics.OnStaticResourceResolved(resourceDictionary, Key, valueProvider.TargetObject, valueProvider.TargetProperty);

src/Controls/tests/Xaml.UnitTests/HotReloadStaticResourceException.xaml.cs

@@ -47,14 +47,10 @@ internal void MissingResourceExceptionAreHandled(XamlInflator inflator)
 					handled = true;
 					Assert.Equal(13, xpe.XmlInfo.LinePosition);
 				}
+
 			};
-
-			// Now expect the exception to be thrown (after handler is invoked)
-			var exception = Assert.Throws<XamlParseException>(() => new HotReloadStaticResourceException(inflator));
-
-			// Verify handler was invoked and exception details are correct
-			Assert.True(handled, "Exception handler was not invoked");
-			Assert.Contains("StaticResource not found for key MissingResource", exception.Message, System.StringComparison.Ordinal);
+			var page = new HotReloadStaticResourceException(inflator);
+			Assert.True(handled, "Exception was not handled");
 		}
 #else
 		[Fact(Skip = "This test runs only in debug")]