diff --git a/ui/src/pages/Inbox.test.tsx b/ui/src/pages/Inbox.test.tsx
index d388f9d5d8..659f9fa53b 100644
--- a/ui/src/pages/Inbox.test.tsx
+++ b/ui/src/pages/Inbox.test.tsx
@@ -17,6 +17,10 @@ const routerMock = vi.hoisted(() => ({
   navigate: vi.fn(),
 }));
 
+const externalObjectMocks = vi.hoisted(() => ({
+  summaries: new Map(),
+}));
+
 const apiMocks = vi.hoisted(() => ({
   approvalsList: vi.fn(),
   joinRequestsList: vi.fn(),
@@ -126,6 +130,14 @@ vi.mock("../hooks/useInboxBadge", () => ({
   }),
 }));
 
+vi.mock("../hooks/useIssueExternalObjects", () => ({
+  useIssueExternalObjectSummaries: () => ({
+    summaries: externalObjectMocks.summaries,
+    isLoading: false,
+    isReady: true,
+  }),
+}));
+
 import {
   FailedRunInboxRow,
   Inbox,
@@ -255,6 +267,7 @@ function createJoinRequest(
 
 function resetInboxApiMocks() {
   for (const mock of Object.values(apiMocks)) mock.mockReset();
+  externalObjectMocks.summaries.clear();
   routerMock.location.pathname = "/";
   routerMock.location.search = "";
   routerMock.location.hash = "";
@@ -299,6 +312,38 @@ describe("Inbox toolbar", () => {
     container.remove();
   });
 
+  it("does not render external-object summaries in inbox rows", async () => {
+    routerMock.location.pathname = "/inbox/mine";
+    const issue = createIssue({ title: "Inbox row without external object column" });
+    apiMocks.issuesList.mockResolvedValue([issue]);
+    externalObjectMocks.summaries.set(issue.id, {
+      total: 1,
+      highestSeverity: "failed",
+      byStatusCategory: { failed: 1 },
+      objects: [],
+    });
+
+    const queryClient = new QueryClient({
+      defaultOptions: { queries: { retry: false, staleTime: 0, gcTime: 0 } },
+    });
+    const root = createRoot(container);
+
+    await act(async () => {
+      root.render(
+        <QueryClientProvider client={queryClient}>
+          <Inbox />
+        </QueryClientProvider>,
+      );
+    });
+    await vi.waitFor(() => {
+      expect(container.textContent).toContain(issue.title);
+    });
+
+    expect(container.querySelector('[aria-label^="External objects:"]')).toBeNull();
+
+    act(() => root.unmount());
+  });
+
   it("shows blocked toolbar controls on the Blocked tab", async () => {
     routerMock.location.pathname = "/inbox/blocked";
     const queryClient = new QueryClient({
diff --git a/ui/src/pages/Inbox.tsx b/ui/src/pages/Inbox.tsx
index 894137a9fb..654e41ce37 100644
--- a/ui/src/pages/Inbox.tsx
+++ b/ui/src/pages/Inbox.tsx
@@ -2599,7 +2599,6 @@ export function Inbox() {
                       issueLinkState={issueLinkState}
                       treeGuides={depth}
                       hideDivider={hasChildren && isExpanded}
-                      externalObjectSummary={externalObjectSummaryByIssueId.get(issue.id) ?? null}
                       selected={selected}
                       className={
                         isArchiving