diff --git a/ui/src/app/overlays.test.ts b/ui/src/app/overlays.test.ts
index e653b119792c..b5ba79f81fc0 100644
--- a/ui/src/app/overlays.test.ts
+++ b/ui/src/app/overlays.test.ts
@@ -143,3 +143,25 @@ describe("application approval overlays", () => {
     overlays.dispose();
   });
 });
+
+describe("application update overlays", () => {
+  it("surfaces a coalesced restart while reconnect verification remains active", async () => {
+    const request = vi.fn<RequestFn>().mockResolvedValue({
+      ok: true,
+      restart: { coalesced: true },
+      result: { status: "ok", after: { version: "2.0.0" } },
+    });
+    const harness = createGatewayHarness(client(request));
+    const overlays = createApplicationOverlays(harness.gateway);
+
+    await overlays.runUpdate();
+
+    expect(request).toHaveBeenCalledWith("update.run", {});
+    expect(overlays.snapshot.updateStatusBanner).toEqual({
+      tone: "info",
+      text: "Update installed. A gateway restart is already in progress; status will refresh after it reconnects.",
+    });
+    expect(overlays.snapshot.updateRunning).toBe(false);
+    overlays.dispose();
+  });
+});
diff --git a/ui/src/app/overlays.ts b/ui/src/app/overlays.ts
index 9b7f9314fbbd..95d794b11fa0 100644
--- a/ui/src/app/overlays.ts
+++ b/ui/src/app/overlays.ts
@@ -191,6 +191,7 @@ type UpdateRunResponse = {
     after?: { version?: string | null } | null;
   };
   handoff?: { status?: string };
+  restart?: { coalesced?: boolean } | null;
 };
 
 export function createApplicationOverlays(gateway: ApplicationGateway): ApplicationOverlays {
@@ -521,6 +522,15 @@ export function createApplicationOverlays(gateway: ApplicationGateway): Applicat
         if (response.ok === true && status === "ok") {
           pendingUpdateExpectedVersion = expectedVersion;
           pendingUpdateHandoff = false;
+          if (response.restart?.coalesced === true) {
+            snapshot = {
+              ...snapshot,
+              updateStatusBanner: {
+                tone: "info",
+                text: "Update installed. A gateway restart is already in progress; status will refresh after it reconnects.",
+              },
+            };
+          }
           return;
         }
         pendingUpdateExpectedVersion = null;
diff --git a/ui/src/e2e/update-coalesced.e2e.test.ts b/ui/src/e2e/update-coalesced.e2e.test.ts
new file mode 100644
index 000000000000..1feea5d99559
--- /dev/null
+++ b/ui/src/e2e/update-coalesced.e2e.test.ts
@@ -0,0 +1,81 @@
+import path from "node:path";
+import { chromium, type Browser } from "playwright";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import {
+  canRunPlaywrightChromium,
+  installMockGateway,
+  resolvePlaywrightChromiumExecutablePath,
+  startControlUiE2eServer,
+  type ControlUiE2eServer,
+} from "../test-helpers/control-ui-e2e.ts";
+
+const chromiumExecutablePath = resolvePlaywrightChromiumExecutablePath(chromium.executablePath());
+const chromiumAvailable = canRunPlaywrightChromium(chromiumExecutablePath);
+const allowMissingChromium = process.env.OPENCLAW_UI_E2E_ALLOW_MISSING_CHROMIUM === "1";
+const describeControlUiE2e = chromiumAvailable || !allowMissingChromium ? describe : describe.skip;
+
+let browser: Browser;
+let server: ControlUiE2eServer;
+
+describeControlUiE2e("Control UI coalesced update E2E", () => {
+  beforeAll(async () => {
+    if (!chromiumAvailable) {
+      throw new Error(`Playwright Chromium is unavailable at ${chromiumExecutablePath}`);
+    }
+    server = await startControlUiE2eServer();
+    browser = await chromium.launch({ executablePath: chromiumExecutablePath });
+  });
+
+  afterAll(async () => {
+    await browser?.close();
+    await server?.close();
+  });
+
+  it("shows coalesced restart feedback after the Update click", async () => {
+    const artifactDir = path.resolve(".artifacts/control-ui-e2e/update-coalesced");
+    const context = await browser.newContext({
+      locale: "en-US",
+      recordVideo: { dir: artifactDir, size: { height: 720, width: 1280 } },
+      serviceWorkers: "block",
+      viewport: { height: 720, width: 1280 },
+    });
+    const page = await context.newPage();
+    const pageErrors: string[] = [];
+    page.on("pageerror", (error) => pageErrors.push(String(error)));
+    const gateway = await installMockGateway(page, {
+      methodResponses: {
+        "update.run": {
+          ok: true,
+          restart: { coalesced: true },
+          result: { after: { version: "2.0.0" }, status: "ok" },
+        },
+      },
+    });
+
+    try {
+      expect((await page.goto(`${server.baseUrl}chat`))?.status()).toBe(200);
+      await gateway.emitGatewayEvent("update.available", {
+        updateAvailable: {
+          channel: "stable",
+          currentVersion: "1.0.0",
+          latestVersion: "2.0.0",
+        },
+      });
+
+      await page.getByRole("button", { name: "Update now" }).click();
+      await page
+        .getByText(
+          "Update installed. A gateway restart is already in progress; status will refresh after it reconnects.",
+          { exact: true },
+        )
+        .waitFor();
+
+      expect(await gateway.getRequests("update.run")).toHaveLength(1);
+      expect(await page.getByRole("button", { name: "Update now" }).isEnabled()).toBe(true);
+      expect(pageErrors).toEqual([]);
+      await page.screenshot({ path: path.join(artifactDir, "coalesced-restart-banner.png") });
+    } finally {
+      await context.close();
+    }
+  });
+});