diff --git a/ui/src/e2e/chat-continue-in-terminal.e2e.test.ts b/ui/src/e2e/chat-continue-in-terminal.e2e.test.ts
index 6648f5801a60..c71bc1f9c80b 100644
--- a/ui/src/e2e/chat-continue-in-terminal.e2e.test.ts
+++ b/ui/src/e2e/chat-continue-in-terminal.e2e.test.ts
@@ -3,7 +3,12 @@ import path from "node:path";
 import { expect, it } from "vitest";
 import { decodeResumeHandoff } from "../../../src/shared/resume-handoff.js";
 import type { ChatPaneElement } from "../pages/chat/route-draft-focus-handoff.ts";
-import { controlUiSessionUrl, installMockGateway } from "../test-helpers/control-ui-e2e.ts";
+import {
+  controlUiSessionPath,
+  controlUiSessionUrl,
+  installMockGateway,
+  waitForControlUiRoute,
+} from "../test-helpers/control-ui-e2e.ts";
 import { createControlUiE2eSuite } from "./control-ui-e2e-suite.test-support.ts";
 
 const suite = createControlUiE2eSuite({
@@ -100,6 +105,13 @@ suite.define(() => {
         await expect
           .poll(() => activePane.evaluate((pane) => (pane as ChatPaneElement).sessionKey))
           .toBe(sessionKey);
+        await waitForControlUiRoute(page, {
+          routeId: "chat",
+          pathname: controlUiSessionPath(sessionKey, basePath),
+          pathnamePrefix: `${basePath}/chat/`,
+          search: "",
+          hash: "",
+        });
         await activePane.getByText("Ready for terminal continuation.").waitFor({ timeout: 10_000 });
 
         const menuTrigger = activePane.getByRole("button", {
@@ -182,6 +194,7 @@ suite.define(() => {
         await expect
           .poll(() => activePane.evaluate((pane) => (pane as ChatPaneElement).sessionKey))
           .toBe(sessionKey);
+        await waitForControlUiRoute(page, { routeId: "chat" });
         await activePane
           .getByRole("paragraph")
           .filter({ hasText: /^Mobile session menu proof\.$/ })
diff --git a/ui/src/e2e/control-ui-route-readiness.e2e.test.ts b/ui/src/e2e/control-ui-route-readiness.e2e.test.ts
new file mode 100644
index 000000000000..3421a4803798
--- /dev/null
+++ b/ui/src/e2e/control-ui-route-readiness.e2e.test.ts
@@ -0,0 +1,44 @@
+import { expect, it } from "vitest";
+import type { ChatPaneElement } from "../pages/chat/route-draft-focus-handoff.ts";
+import {
+  controlUiSessionUrl,
+  installMockGateway,
+  navigateToControlUiSession,
+} from "../test-helpers/control-ui-e2e.ts";
+import { createControlUiE2eSuite } from "./control-ui-e2e-suite.test-support.ts";
+
+const suite = createControlUiE2eSuite({ name: "Control UI route readiness" });
+
+suite.define(() => {
+  it.each([
+    { name: "root", basePath: "" },
+    { name: "encoded mount", basePath: "/nested/$&;=()+,![]{}'`/%25PATH%25" },
+  ])("navigates exact session keys at the $name", async ({ basePath }) => {
+    await suite.withPage({ viewport: { width: 1200, height: 800 } }, async ({ page }) => {
+      const initialSessionKey = "agent:runner:route:initial";
+      await installMockGateway(page, { basePath, sessionKey: initialSessionKey });
+      await page.goto(controlUiSessionUrl(suite.server.baseUrl, initialSessionKey));
+      const visiblePane = page.locator("openclaw-chat-pane.chat-pane-cache__pane--visible");
+      await expect
+        .poll(() => visiblePane.evaluate((pane) => (pane as ChatPaneElement).sessionKey))
+        .toBe(initialSessionKey);
+
+      const mountUrl = new URL(suite.server.baseUrl);
+      mountUrl.pathname = basePath || "/";
+      const encodedBase = basePath ? mountUrl.pathname : "";
+      for (const [rest, suffix] of [
+        ["a/b", "a%2Fb"],
+        ["a:b", "a/b"],
+        ["%2F%25%3F%23", "%252F%2525%253F%2523"],
+        ["a?b#c", "a%3Fb%23c"],
+      ]) {
+        const sessionKey = `agent:runner:route:${rest}`;
+        await navigateToControlUiSession(page, sessionKey);
+        expect(new URL(page.url()).pathname).toBe(`${encodedBase}/chat/runner/route/${suffix}`);
+        expect(await visiblePane.evaluate((pane) => (pane as ChatPaneElement).sessionKey)).toBe(
+          sessionKey,
+        );
+      }
+    });
+  });
+});
diff --git a/ui/src/test-helpers/control-ui-e2e.ts b/ui/src/test-helpers/control-ui-e2e.ts
index 3933d76b54dd..37dfcbe0ab41 100644
--- a/ui/src/test-helpers/control-ui-e2e.ts
+++ b/ui/src/test-helpers/control-ui-e2e.ts
@@ -34,10 +34,11 @@ export function controlUiSessionUrl(baseUrl: string, sessionKey: string): string
 }
 
 export async function navigateToControlUiSession(page: Page, sessionKey: string): Promise<void> {
-  await page.evaluate((pathname) => {
+  const expectedPathname = await page.evaluate((sessionPath) => {
     const app = document.querySelector("openclaw-app") as HTMLElement & {
       runtime?: {
         context: {
+          basePath: string;
           navigate: (routeId: string, options: { pathname: string }) => void;
         };
       };
@@ -45,9 +46,13 @@ export async function navigateToControlUiSession(page: Page, sessionKey: string)
     if (!app.runtime) {
       throw new Error("OpenClaw application runtime is unavailable");
     }
+    const pathname = `${app.runtime.context.basePath}${sessionPath}`;
+    const url = new URL(window.location.href);
+    url.pathname = pathname;
     app.runtime.context.navigate("chat", { pathname });
+    return url.pathname;
   }, controlUiSessionPath(sessionKey));
-  await page.waitForURL((url) => url.pathname === controlUiSessionPath(sessionKey));
+  await page.waitForURL((url) => url.pathname === expectedPathname);
   await page.waitForFunction(
     (targetSessionKey) =>
       [...document.querySelectorAll<HTMLElement>("openclaw-chat-pane")].some(
@@ -109,13 +114,22 @@ export async function waitForControlUiRoute(page: Page, target: ControlUiRouteTa
         };
         const state = app.runtime?.router.getState();
         const pathname = window.location.pathname;
+        // Router paths retain literal characters that browser history percent-encodes.
+        // Serialize as a pathname; decoding would alias encoded delimiters and percent data.
+        const browserPathname = (value: string) => {
+          const url = new URL(window.location.href);
+          url.pathname = value;
+          return url.pathname;
+        };
         return (
           state?.status === "success" &&
           state.matches[0]?.routeId === expected.routeId &&
-          state.resolvedLocation?.pathname === pathname &&
+          state.resolvedLocation !== null &&
+          browserPathname(state.resolvedLocation.pathname) === pathname &&
           state.pendingMatches.length === 0 &&
-          (expected.pathname === undefined || pathname === expected.pathname) &&
-          (expected.pathnamePrefix === undefined || pathname.startsWith(expected.pathnamePrefix)) &&
+          (expected.pathname === undefined || pathname === browserPathname(expected.pathname)) &&
+          (expected.pathnamePrefix === undefined ||
+            pathname.startsWith(browserPathname(expected.pathnamePrefix))) &&
           (expected.search === undefined || window.location.search === expected.search) &&
           (expected.hash === undefined || window.location.hash === expected.hash)
         );