Fix RootComponentView leak (microsoft#13959)

* Fix RootComponentView leak * Change files * format --------- Co-authored-by: React-Native-Windows Bot <53619745+rnbot@users.noreply.github.com>
acoates-ms · Oct 16, 2024 · 7b61523 · 7b61523
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diff --git a/change/react-native-windows-408fe985-f784-4dff-aed3-9045a0c7a420.json b/change/react-native-windows-408fe985-f784-4dff-aed3-9045a0c7a420.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Fix RootComponentView leak",
+  "packageName": "react-native-windows",
+  "email": "53619745+rnbot@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}
diff --git a/vnext/Microsoft.ReactNative/Fabric/Composition/ReactNativeIsland.cpp b/vnext/Microsoft.ReactNative/Fabric/Composition/ReactNativeIsland.cpp
@@ -157,6 +157,7 @@ void ReactNativeIsland::ReactViewHost(winrt::Microsoft::ReactNative::IReactViewH
   }
 
   if (m_reactViewHost) {
+    UninitRootView();
     m_reactViewHost.DetachViewInstance();
   }
 

diff --git a/vnext/Microsoft.ReactNative/Fabric/FabricUIManagerModule.cpp b/vnext/Microsoft.ReactNative/Fabric/FabricUIManagerModule.cpp
@@ -155,6 +155,9 @@ void FabricUIManager::startSurface(
 
 void FabricUIManager::stopSurface(facebook::react::SurfaceId surfaceId) noexcept {
   m_surfaceManager->stopSurface(surfaceId);
+  auto &rootDescriptor = m_registry.componentViewDescriptorWithTag(surfaceId);
+  m_registry.enqueueComponentViewWithComponentHandle(
+      facebook::react::RootShadowNode::Handle(), surfaceId, rootDescriptor);
 }
 
 winrt::Microsoft::ReactNative::ReactNativeIsland FabricUIManager::GetReactNativeIsland(