From e9ca8d6b460ac5556d4035fc71712cb56f4911bf Mon Sep 17 00:00:00 2001
From: Jon Wiswall <jonwis@microsoft.com>
Date: Mon, 13 Apr 2026 15:26:44 -0700
Subject: [PATCH] Guard island input site fallback during shutdown

---
 src/dxaml/xcp/core/core/elements/depends.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/dxaml/xcp/core/core/elements/depends.cpp b/src/dxaml/xcp/core/core/elements/depends.cpp
index 0b42f0cab9..4ca3a52057 100644
--- a/src/dxaml/xcp/core/core/elements/depends.cpp
+++ b/src/dxaml/xcp/core/core/elements/depends.cpp
@@ -323,7 +323,7 @@ wrl::ComPtr<InputSiteHelper::IIslandInputSite> CDependencyObject::GetElementIsla
             return spPopup->GetIslandInputSite();
         }
 
-        if (coreServices->HasXamlIslandRoots())
+        if (coreServices && coreServices->HasXamlIslandRoots())
         {
             // If this element is in a XamlIslandRoot tree, return the IslandInputSite for that island.
             auto root = coreServices->GetRootForElement(this);
@@ -336,7 +336,15 @@ wrl::ComPtr<InputSiteHelper::IIslandInputSite> CDependencyObject::GetElementIsla
     }
 
     // By default, return the primary IslandInputSite that was registered with InputServices on startup.
-    return coreServices->GetInputServices()->GetPrimaryRegisteredIslandInputSite();
+    if (coreServices)
+    {
+        if (auto inputServices = coreServices->GetInputServices())
+        {
+            return inputServices->GetPrimaryRegisteredIslandInputSite();
+        }
+    }
+
+    return nullptr;
 }
 
 HWND CDependencyObject::GetElementPositioningWindow()