Fix TextInput selection prop (#15672) (#15673)

* Fix TextInput selection crash and feedback loop

* Change files

* add comment for the drawblock defer added

Author: iamAbhi-916

change/react-native-windows-b56ee389-667d-4a9b-bc6a-73fa937f57c8.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Fix TextInput selection crash and feedback loop",
+  "packageName": "react-native-windows",
+  "email": "74712637+iamAbhi-916@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}

vnext/Microsoft.ReactNative/Fabric/Composition/TextInput/WindowsTextInputComponentView.cpp

@@ -1227,8 +1227,11 @@ void WindowsTextInputComponentView::updateState(
   if (m_mostRecentEventCount == m_state->getData().mostRecentEventCount) {
     m_comingFromState = true;
     auto &fragments = m_state->getData().attributedStringBox.getValue().getFragments();
-    UpdateText(fragments.size() ? fragments[0].string : "");
-
+    {
+      // DrawBlock defers DrawText() until after UpdateText completes
+      DrawBlock db(*this);
+      UpdateText(fragments.size() ? fragments[0].string : "");
+    }
     m_comingFromState = false;
   }
 }
@@ -1377,7 +1380,7 @@ void WindowsTextInputComponentView::EmitOnScrollEvent() noexcept {
 }
 
 void WindowsTextInputComponentView::OnSelectionChanged(LONG start, LONG end) noexcept {
-  if (m_eventEmitter && !m_comingFromState /* && !m_comingFromJS ?? */) {
+  if (m_eventEmitter && !m_comingFromState && !m_comingFromJS) {
     auto emitter = std::static_pointer_cast<const facebook::react::WindowsTextInputEventEmitter>(m_eventEmitter);
     facebook::react::WindowsTextInputEventEmitter::OnSelectionChange onSelectionChangeArgs;
     onSelectionChangeArgs.selection.start = start;