diff --git a/ui/src/i18n/locales/en.ts b/ui/src/i18n/locales/en.ts
index c84b8a0f6216..b2986462d8f6 100644
--- a/ui/src/i18n/locales/en.ts
+++ b/ui/src/i18n/locales/en.ts
@@ -2794,6 +2794,7 @@ export const en: TranslationMap = {
     unavailable: "Unavailable",
     install: "Install",
     installing: "Installing…",
+    checkingInstallOutcome: "Checking…",
     installNamed: "Install {name}",
     acknowledgeRisk: "Acknowledge risk and install",
     defaultRiskWarning: "Review the ClawHub warning before installing this plugin.",
@@ -2806,6 +2807,10 @@ export const en: TranslationMap = {
     policyReviewSeverityCritical: "Critical",
     policyReviewTechnicalDetails: "Details",
     installAnyway: "Install anyway",
+    installOutcomeChecking:
+      "The Gateway connection changed before OpenClaw confirmed this install. Checking plugin status…",
+    installOutcomeFailed:
+      "OpenClaw couldn’t confirm whether this plugin was installed. Retry the status check before installing again.",
     connectToChange: "Connect to the gateway to change plugins.",
     adminRequired: "Browsing only. Plugin changes require operator.admin access.",
     changesDisabled: "Browsing only. This gateway does not allow plugin changes.",
diff --git a/ui/src/pages/plugins/plugins-page.test-support.ts b/ui/src/pages/plugins/plugins-page.test-support.ts
index 0b3679d7535d..d13b612c0c7a 100644
--- a/ui/src/pages/plugins/plugins-page.test-support.ts
+++ b/ui/src/pages/plugins/plugins-page.test-support.ts
@@ -20,6 +20,7 @@ import {
 } from "../../test-helpers/application-context.ts";
 import type { PluginsRouteData } from "./plugins-page.ts";
 import type { PluginRowMessage } from "./view.ts";
+import type { InstallOutcomeReconciliation } from "./view.ts";
 import "./plugins-page.ts";
 
 type RequestHandler = (method: string, params: unknown) => Promise<unknown>;
@@ -35,11 +36,13 @@ type TestPluginsPage = HTMLElement & {
   result: PluginListResult | null;
   loading: boolean;
   busy: Record<string, boolean>;
+  installOutcomeReconciliations: Record<string, InstallOutcomeReconciliation>;
   messages: Record<string, PluginRowMessage>;
   activeTab: "installed" | "discover";
   searchResults: PluginSearchResult[] | null;
   applyMutationResult: (result: PluginMutationResult) => void;
   install: (rowKey: string, request: PluginInstallRequest) => Promise<void>;
+  refreshCatalog: () => Promise<void>;
   updateEnabled: (pluginId: string, enabled: boolean, key?: string) => Promise<void>;
   uninstall: (pluginId: string, rowKey: string) => Promise<void>;
 };
diff --git a/ui/src/pages/plugins/plugins-page.test.ts b/ui/src/pages/plugins/plugins-page.test.ts
index 4e480c221df5..4f0bedcfc7c9 100644
--- a/ui/src/pages/plugins/plugins-page.test.ts
+++ b/ui/src/pages/plugins/plugins-page.test.ts
@@ -201,8 +201,9 @@ describe("PluginsPage", () => {
     );
   });
 
-  it("retires a pending install-policy review across a same-client reconnect", async () => {
+  it("reconciles a pending install-policy retry before allowing another install", async () => {
     const retry = deferred<PluginMutationResult>();
+    const catalogRefresh = deferred<PluginListResult>();
     let installCalls = 0;
     const { client, request } = createClient(async (method) => {
       if (method === "plugins.install") {
@@ -224,7 +225,7 @@ describe("PluginsPage", () => {
         return retry.promise;
       }
       if (method === "plugins.list") {
-        return createResult();
+        return catalogRefresh.promise;
       }
       throw new Error(`Unexpected method ${method}`);
     });
@@ -252,11 +253,24 @@ describe("PluginsPage", () => {
       expect(request.mock.calls.filter(([method]) => method === "plugins.install")).toHaveLength(2),
     );
     expect(page.messages[rowKey]?.installPolicyWarning).toBeDefined();
+    page.messages["plugin:workboard"] = { kind: "success", text: "Unrelated message." };
 
     harness.emit(client, false);
     harness.emit(client, true);
-    await page.updateComplete;
+    await waitForFast(() =>
+      expect(request.mock.calls.filter(([method]) => method === "plugins.list")).toHaveLength(1),
+    );
     expect(page.messages[rowKey]).toBeUndefined();
+    expect(page.messages["plugin:workboard"]?.text).toBe("Unrelated message.");
+    expect(page.installOutcomeReconciliations[rowKey]).toBe("checking");
+
+    catalogRefresh.resolve(
+      createResult(
+        createPlugin({ id: "lobster", name: "Lobster", installed: true, enabled: true }),
+      ),
+    );
+    await waitForFast(() => expect(page.installOutcomeReconciliations[rowKey]).toBeUndefined());
+    expect(page.result?.plugins[0]?.installed).toBe(true);
 
     retry.resolve({
       ok: true,
@@ -265,6 +279,73 @@ describe("PluginsPage", () => {
     });
     await pendingRetry;
     expect(page.messages[rowKey]).toBeUndefined();
+    expect(page.result?.plugins[0]?.installed).toBe(true);
+  });
+
+  it("keeps an unknown install outcome blocked until a failed catalog check is retried", async () => {
+    const retry = deferred<PluginMutationResult>();
+    let installCalls = 0;
+    let listCalls = 0;
+    const { client } = createClient(async (method) => {
+      if (method === "plugins.install") {
+        installCalls += 1;
+        if (installCalls === 1) {
+          throw new GatewayRequestError({
+            code: "INVALID_REQUEST",
+            message: "install requires review",
+            details: {
+              installPolicyCode: "install_policy_warning_acknowledgement_required",
+              targetName: "@openclaw/lobster",
+              targetType: "plugin",
+              requestMode: "install",
+              reason: "Review this plugin.",
+              acknowledgementToken: "approval-token",
+            },
+          });
+        }
+        return retry.promise;
+      }
+      if (method === "plugins.list") {
+        listCalls += 1;
+        if (listCalls === 1) {
+          throw new Error("catalog unavailable");
+        }
+        return createResult(
+          createPlugin({
+            id: "lobster",
+            name: "Lobster",
+            installed: false,
+            install: { source: "clawhub", packageName: "@openclaw/lobster" },
+          }),
+        );
+      }
+      throw new Error(`Unexpected method ${method}`);
+    });
+    const harness = createGateway(client);
+    const { page } = await mountPage(
+      createContext(harness.gateway),
+      createPluginsRouteData(harness.gateway),
+    );
+    const rowKey = "plugin:@openclaw/lobster";
+    const installRequest = {
+      source: "clawhub",
+      packageName: "@openclaw/lobster",
+    } satisfies PluginInstallRequest;
+
+    await page.install(rowKey, installRequest);
+    void page.install(rowKey, {
+      ...installRequest,
+      installPolicyWarningAcknowledgement: "approval-token",
+    });
+    await waitForFast(() => expect(installCalls).toBe(2));
+
+    harness.emit(client, false);
+    harness.emit(client, true);
+    await waitForFast(() => expect(page.installOutcomeReconciliations[rowKey]).toBe("failed"));
+
+    await page.refreshCatalog();
+    expect(page.installOutcomeReconciliations[rowKey]).toBeUndefined();
+    expect(page.result?.plugins[0]?.installed).toBe(false);
   });
 
   it("debounces two-character ClawHub searches and cancels stale input", async () => {
diff --git a/ui/src/pages/plugins/plugins-page.ts b/ui/src/pages/plugins/plugins-page.ts
index 5415e5a1f9ea..365b2e3abe94 100644
--- a/ui/src/pages/plugins/plugins-page.ts
+++ b/ui/src/pages/plugins/plugins-page.ts
@@ -61,6 +61,7 @@ import {
   pluginRowKey,
   renderPlugins,
   type InstalledFilter,
+  type InstallOutcomeReconciliation,
   type PluginRowMessage,
   type PluginsTab,
 } from "./view.ts";
@@ -129,6 +130,7 @@ class PluginsPage extends OpenClawLightDomElement {
   @state() private installedFilter: InstalledFilter = "all";
   @state() private debouncedSearchQuery = "";
   @state() private busy: Record<string, boolean> = {};
+  @state() private installOutcomeReconciliations: Record<string, InstallOutcomeReconciliation> = {};
   @state() private messages: Record<string, PluginRowMessage> = {};
   @state() private pendingRemoval: Record<string, boolean> = {};
   @state() private detailPluginId: string | null = null;
@@ -153,6 +155,7 @@ class PluginsPage extends OpenClawLightDomElement {
   private readonly gateway = new GatewayPageController(this, {
     getGateway: () => this.context?.gateway,
     onIdentityChange: () => {
+      this.captureUnknownInstallOutcomes();
       this.result = null;
       this.error = null;
       this.messages = {};
@@ -173,9 +176,11 @@ class PluginsPage extends OpenClawLightDomElement {
       client ? client.request<PluginListResult>("plugins.list", {}, { signal }) : initialState,
     onComplete: (result) => {
       this.replaceResult(result);
+      this.clearInstallOutcomeReconciliations();
     },
     onError: (error) => {
       this.error = formatUiError(error);
+      this.failInstallOutcomeReconciliations();
     },
   });
 
@@ -363,10 +368,41 @@ class PluginsPage extends OpenClawLightDomElement {
     void this.configTask.run([null, this.context.runtimeConfig]);
     void this.searchTask.run([null, ""]);
     this.mutationTokens.clear();
-    // A connection-epoch change makes the one-shot approval outcome unknown;
-    // retire its action so reconnect cannot resend a spent or process-stale token.
-    this.messages = Object.fromEntries(
-      Object.entries(this.messages).filter(([, message]) => !message.installPolicyWarning),
+    this.captureUnknownInstallOutcomes();
+  }
+
+  private captureUnknownInstallOutcomes() {
+    // Once an acknowledged request crosses a connection epoch, only a fresh catalog can
+    // prove whether it committed. Keep that safety gate separate from dismissible messages.
+    const nextMessages = { ...this.messages };
+    const nextReconciliations = { ...this.installOutcomeReconciliations };
+    for (const [key, message] of Object.entries(this.messages)) {
+      if (!message.installPolicyWarning) {
+        continue;
+      }
+      if (this.busy[key]) {
+        nextReconciliations[key] = "checking";
+      }
+      delete nextMessages[key];
+    }
+    this.messages = nextMessages;
+    this.installOutcomeReconciliations = nextReconciliations;
+  }
+
+  private clearInstallOutcomeReconciliations() {
+    if (Object.keys(this.installOutcomeReconciliations).length === 0) {
+      return;
+    }
+    this.installOutcomeReconciliations = {};
+  }
+
+  private failInstallOutcomeReconciliations() {
+    const entries = Object.keys(this.installOutcomeReconciliations);
+    if (entries.length === 0) {
+      return;
+    }
+    this.installOutcomeReconciliations = Object.fromEntries(
+      entries.map((key) => [key, "failed" as const]),
     );
   }
 
@@ -571,6 +607,11 @@ class PluginsPage extends OpenClawLightDomElement {
     if (!client || !this.gateway.connected) {
       return;
     }
+    if (Object.keys(this.installOutcomeReconciliations).length > 0) {
+      this.installOutcomeReconciliations = Object.fromEntries(
+        Object.keys(this.installOutcomeReconciliations).map((key) => [key, "checking" as const]),
+      );
+    }
     this.error = null;
     await this.catalogTask.run([client]);
   }
@@ -1027,6 +1068,7 @@ class PluginsPage extends OpenClawLightDomElement {
           searchLoading: this.searchLoading,
           searchError: this.searchError,
           busy: this.busy,
+          installOutcomeReconciliations: this.installOutcomeReconciliations,
           messages: this.messages,
           pendingRemoval: this.pendingRemoval,
           detailPluginId: this.detailPluginId,
@@ -1052,6 +1094,7 @@ class PluginsPage extends OpenClawLightDomElement {
             void this.updateEnabled(pluginId, enabled, rowKey),
           onInstall: (rowKey, request) => void this.install(rowKey, request),
           onDismissMessage: (rowKey) => this.setMessage(rowKey, null),
+          onRetryInstallOutcome: () => void this.refreshCatalog(),
           onRequestUninstall: (rowKey) => this.setPendingRemoval(rowKey, true),
           onCancelUninstall: (rowKey) => this.setPendingRemoval(rowKey, false),
           onUninstall: (pluginId, rowKey) => void this.uninstall(pluginId, rowKey),
diff --git a/ui/src/pages/plugins/plugins.e2e.test.ts b/ui/src/pages/plugins/plugins.e2e.test.ts
index 559ff549e46c..ce291b5cf05e 100644
--- a/ui/src/pages/plugins/plugins.e2e.test.ts
+++ b/ui/src/pages/plugins/plugins.e2e.test.ts
@@ -813,7 +813,7 @@ describeControlUiE2e("Control UI Plugins mocked Gateway E2E", () => {
     }
   });
 
-  it("retires a pending install-policy review after reconnect", async () => {
+  it("reconciles a pending install-policy review before allowing another install", async () => {
     const context = await newContext();
     const page = await context.newPage();
     const gateway = await installMockGateway(page, {
@@ -844,6 +844,7 @@ describeControlUiE2e("Control UI Plugins mocked Gateway E2E", () => {
       await waitForNextRequest(gateway, "plugins.install", installCountBeforeRetry);
       await review.getByRole("button", { name: "Installing…", exact: true }).waitFor();
 
+      await gateway.deferNext("plugins.list");
       const socketsBeforeReconnect = await gateway.getSocketCount();
       await gateway.closeLatest(1001, "install-policy reconnect proof");
       await expect
@@ -851,10 +852,42 @@ describeControlUiE2e("Control UI Plugins mocked Gateway E2E", () => {
         .toBeGreaterThan(socketsBeforeReconnect);
 
       await review.waitFor({ state: "detached" });
-      await row.getByRole("button", { name: "Install Lobster", exact: true }).waitFor();
+      await row.getByText("Checking plugin status…", { exact: false }).waitFor();
+      const blockedInstall = row.getByRole("button", { name: "Install Lobster", exact: true });
+      expect(await blockedInstall.isDisabled()).toBe(true);
       expect(await row.getByRole("button", { name: "Install anyway", exact: true }).count()).toBe(
         0,
       );
+      expect((await gateway.getRequests("plugins.install")).length).toBe(2);
+
+      await gateway.rejectDeferred("plugins.list", {
+        code: "UNAVAILABLE",
+        message: "catalog unavailable",
+      });
+      await row
+        .getByText("couldn’t confirm whether this plugin was installed", {
+          exact: false,
+        })
+        .waitFor();
+      expect(await blockedInstall.isDisabled()).toBe(true);
+
+      const listCountBeforeRetry = (await gateway.getRequests("plugins.list")).length;
+      await gateway.deferNext("plugins.list");
+      await row.getByRole("button", { name: "Retry", exact: true }).click();
+      await waitForNextRequest(gateway, "plugins.list", listCountBeforeRetry);
+      await gateway.resolveDeferred(
+        "plugins.list",
+        inventory([workboardDisabled, installedLobsterPlugin, remoteIconPlugin]),
+      );
+      await row.getByRole("button", { name: "Disable", exact: true }).waitFor();
+      expect(await row.getByText("couldn’t confirm", { exact: false }).count()).toBe(0);
+
+      await gateway.resolveDeferred("plugins.install", {
+        ok: true,
+        plugin: installedLobsterPlugin,
+        restartRequired: true,
+      } satisfies PluginMutationResult);
+      await row.getByRole("button", { name: "Disable", exact: true }).waitFor();
     } finally {
       await context.close();
     }
diff --git a/ui/src/pages/plugins/view.test.ts b/ui/src/pages/plugins/view.test.ts
index a1f689fb8a46..3a7f67b47eb6 100644
--- a/ui/src/pages/plugins/view.test.ts
+++ b/ui/src/pages/plugins/view.test.ts
@@ -46,6 +46,7 @@ function createProps(overrides: Partial<PluginsViewProps> = {}): PluginsViewProp
     searchLoading: false,
     searchError: null,
     busy: {},
+    installOutcomeReconciliations: {},
     messages: {},
     pendingRemoval: {},
     detailPluginId: null,
@@ -66,6 +67,7 @@ function createProps(overrides: Partial<PluginsViewProps> = {}): PluginsViewProp
     onSetEnabled: () => undefined,
     onInstall: () => undefined,
     onDismissMessage: () => undefined,
+    onRetryInstallOutcome: () => undefined,
     onRequestUninstall: () => undefined,
     onCancelUninstall: () => undefined,
     onUninstall: () => undefined,
@@ -764,6 +766,37 @@ describe("renderPlugins", () => {
     });
   });
 
+  it("blocks a repeated install while its reconnect outcome is unresolved", () => {
+    const plugin = createPlugin({
+      id: "lobster",
+      name: "Lobster",
+      installed: false,
+      enabled: false,
+      state: "disabled",
+      install: { source: "clawhub", packageName: "@openclaw/lobster" },
+    });
+    const key = pluginRowKey(plugin.id);
+    const onRetryInstallOutcome = vi.fn();
+    const container = mount(
+      createProps({
+        activeTab: "discover",
+        result: createResult([plugin]),
+        installOutcomeReconciliations: { [key]: "failed" },
+        onRetryInstallOutcome,
+      }),
+    );
+
+    const row = container.querySelector<HTMLElement>('[data-plugin-id="lobster"]');
+    expect(normalizedText(row?.querySelector('[role="alert"]') ?? null)).toContain(
+      "couldn’t confirm whether this plugin was installed",
+    );
+    const install = actionButton(row ?? container, "Install Lobster");
+    expect(install?.disabled).toBe(true);
+    expect(normalizedText(install)).toBe("Checking…");
+    row?.querySelector<HTMLButtonElement>('[role="alert"] button')?.click();
+    expect(onRetryInstallOutcome).toHaveBeenCalledOnce();
+  });
+
   it("keeps the not-installed outcome visible for reason-only policy warnings", () => {
     const plugin = createPlugin({
       id: "reason-only",
diff --git a/ui/src/pages/plugins/view.ts b/ui/src/pages/plugins/view.ts
index 0597392636be..1887728c486c 100644
--- a/ui/src/pages/plugins/view.ts
+++ b/ui/src/pages/plugins/view.ts
@@ -55,6 +55,8 @@ export type PluginRowMessage = {
   };
 };
 
+export type InstallOutcomeReconciliation = "checking" | "failed";
+
 type PluginInstallPolicyFinding = NonNullable<
   PluginInstallPolicyWarningDetails["findings"]
 >[number];
@@ -84,6 +86,7 @@ type PluginsViewProps = {
   searchLoading: boolean;
   searchError: string | null;
   busy: Readonly<Record<string, boolean>>;
+  installOutcomeReconciliations: Readonly<Record<string, InstallOutcomeReconciliation>>;
   messages: Readonly<Record<string, PluginRowMessage>>;
   pendingRemoval: Readonly<Record<string, boolean>>;
   detailPluginId: string | null;
@@ -104,6 +107,7 @@ type PluginsViewProps = {
   onSetEnabled: (pluginId: string, enabled: boolean, rowKey: string) => void;
   onInstall: (rowKey: string, request: PluginInstallRequest) => void;
   onDismissMessage: (rowKey: string) => void;
+  onRetryInstallOutcome: () => void;
   onRequestUninstall: (rowKey: string) => void;
   onCancelUninstall: (rowKey: string) => void;
   onUninstall: (pluginId: string, rowKey: string) => void;
@@ -398,6 +402,28 @@ function renderRowMessage(
   busy: boolean,
   props: PluginsViewProps,
 ) {
+  const installOutcome = props.installOutcomeReconciliations[key];
+  if (installOutcome) {
+    return html`
+      <div
+        class="plugins-row-message plugins-row-message--warning"
+        role=${installOutcome === "failed" ? "alert" : "status"}
+      >
+        <span>
+          ${t(
+            installOutcome === "failed"
+              ? "pluginsPage.installOutcomeFailed"
+              : "pluginsPage.installOutcomeChecking",
+          )}
+        </span>
+        ${installOutcome === "failed"
+          ? html`<button type="button" class="btn btn--sm" @click=${props.onRetryInstallOutcome}>
+              ${t("common.retry")}
+            </button>`
+          : nothing}
+      </div>
+    `;
+  }
   if (!message) {
     return nothing;
   }
@@ -608,7 +634,11 @@ function renderInstallButton(
         props.onInstall(key, request);
       }}
     >
-      ${busy ? t("pluginsPage.installing") : t("pluginsPage.install")}
+      ${busy
+        ? props.installOutcomeReconciliations[key]
+          ? t("pluginsPage.checkingInstallOutcome")
+          : t("pluginsPage.installing")
+        : t("pluginsPage.install")}
     </button>
   `;
 }
@@ -734,7 +764,7 @@ function renderPluginRow(
   includePackageName = false,
 ): TemplateResult {
   const key = pluginRowKey(plugin.id);
-  const busy = props.busy[key] ?? false;
+  const busy = Boolean(props.busy[key] || props.installOutcomeReconciliations[key]);
   return html`
     <article
       class="settings-row plugins-item plugins-item--clickable"
@@ -913,7 +943,7 @@ function renderConnectorRow(
   props: PluginsViewProps,
 ): TemplateResult {
   const key = connectorRowKey(connector.id);
-  const busy = props.busy[key] ?? false;
+  const busy = Boolean(props.busy[key] || props.installOutcomeReconciliations[key]);
   const isMcp = connector.action.kind === "mcp";
   const installed =
     isMcp &&
@@ -1000,7 +1030,7 @@ function renderClawHubResult(item: PluginSearchResult, props: PluginsViewProps):
   const pkg = item.package;
   const installed = findInstalledSearchPlugin(item, props.result?.plugins ?? []);
   const key = clawHubRowKey(pkg.name);
-  const busy = props.busy[key] ?? false;
+  const busy = Boolean(props.busy[key] || props.installOutcomeReconciliations[key]);
   const artSlug = pkg.runtimeId ?? pkg.name;
   return html`
     <article
@@ -1173,7 +1203,7 @@ function renderDetailOverlay(props: PluginsViewProps) {
     return nothing;
   }
   const key = pluginRowKey(plugin.id);
-  const busy = props.busy[key] ?? false;
+  const busy = Boolean(props.busy[key] || props.installOutcomeReconciliations[key]);
   return html`
     <openclaw-modal-dialog
       label=${plugin.name}