diff --git a/ui/src/ui/storage.node.test.ts b/ui/src/ui/storage.node.test.ts
index 2155758fe97..f2a4ced6857 100644
--- a/ui/src/ui/storage.node.test.ts
+++ b/ui/src/ui/storage.node.test.ts
@@ -226,6 +226,132 @@ describe("loadSettings default gateway URL derivation", () => {
     });
   });
 
+  it("reuses a session token across loopback host aliases", async () => {
+    setTestLocation({
+      protocol: "http:",
+      host: "127.0.0.1:18789",
+      pathname: "/",
+    });
+
+    const { loadSettings, saveSettings } = await import("./storage.ts");
+    saveSettings({
+      gatewayUrl: "ws://127.0.0.1:18789",
+      token: "loopback-token",
+      sessionKey: "main",
+      lastActiveSessionKey: "main",
+      theme: "system",
+      chatFocusMode: false,
+      chatShowThinking: true,
+      splitRatio: 0.6,
+      navCollapsed: false,
+      navGroupsCollapsed: {},
+    });
+
+    localStorage.setItem(
+      "openclaw.control.settings.v1",
+      JSON.stringify({
+        gatewayUrl: "ws://localhost:18789",
+        sessionKey: "main",
+        lastActiveSessionKey: "main",
+        theme: "system",
+        chatFocusMode: false,
+        chatShowThinking: true,
+        splitRatio: 0.6,
+        navCollapsed: false,
+        navGroupsCollapsed: {},
+      }),
+    );
+
+    expect(loadSettings()).toMatchObject({
+      gatewayUrl: "ws://localhost:18789",
+      token: "loopback-token",
+    });
+  });
+
+  it("reuses a session token across IPv6 and IPv4 loopback aliases", async () => {
+    setTestLocation({
+      protocol: "http:",
+      host: "[::1]:18789",
+      pathname: "/",
+    });
+
+    const { loadSettings, saveSettings } = await import("./storage.ts");
+    saveSettings({
+      gatewayUrl: "ws://[::1]:18789",
+      token: "loopback-token",
+      sessionKey: "main",
+      lastActiveSessionKey: "main",
+      theme: "system",
+      chatFocusMode: false,
+      chatShowThinking: true,
+      splitRatio: 0.6,
+      navCollapsed: false,
+      navGroupsCollapsed: {},
+    });
+
+    localStorage.setItem(
+      "openclaw.control.settings.v1",
+      JSON.stringify({
+        gatewayUrl: "ws://127.0.0.1:18789",
+        sessionKey: "main",
+        lastActiveSessionKey: "main",
+        theme: "system",
+        chatFocusMode: false,
+        chatShowThinking: true,
+        splitRatio: 0.6,
+        navCollapsed: false,
+        navGroupsCollapsed: {},
+      }),
+    );
+
+    expect(loadSettings()).toMatchObject({
+      gatewayUrl: "ws://127.0.0.1:18789",
+      token: "loopback-token",
+    });
+  });
+
+  it("does not reuse a loopback token across different ports", async () => {
+    setTestLocation({
+      protocol: "http:",
+      host: "127.0.0.1:18789",
+      pathname: "/",
+    });
+
+    const { loadSettings, saveSettings } = await import("./storage.ts");
+    saveSettings({
+      gatewayUrl: "ws://127.0.0.1:18789",
+      token: "loopback-token",
+      sessionKey: "main",
+      lastActiveSessionKey: "main",
+      theme: "system",
+      chatFocusMode: false,
+      chatShowThinking: true,
+      splitRatio: 0.6,
+      navCollapsed: false,
+      navGroupsCollapsed: {},
+    });
+
+    localStorage.setItem(
+      "openclaw.control.settings.v1",
+      JSON.stringify({
+        gatewayUrl: "ws://localhost:19999",
+        sessionKey: "main",
+        lastActiveSessionKey: "main",
+        theme: "system",
+        chatFocusMode: false,
+        chatShowThinking: true,
+        splitRatio: 0.6,
+        navCollapsed: false,
+        navGroupsCollapsed: {},
+      }),
+    );
+
+    expect(loadSettings()).toMatchObject({
+      gatewayUrl: "ws://localhost:19999",
+      token: "",
+    });
+  });
+
   it("does not persist gateway tokens when saving settings", async () => {
     setTestLocation({
       protocol: "https:",
diff --git a/ui/src/ui/storage.ts b/ui/src/ui/storage.ts
index 20997b6fec3..d173bda1b46 100644
--- a/ui/src/ui/storage.ts
+++ b/ui/src/ui/storage.ts
@@ -93,9 +93,15 @@ function normalizeGatewayTokenScope(gatewayUrl: string): string {
         ? `${location.protocol}//${location.host}${location.pathname || "/"}`
         : undefined;
     const parsed = base ? new URL(trimmed, base) : new URL(trimmed);
+    const host = parsed.hostname.trim().toLowerCase();
+    const isLoopbackHost =
+      host === "localhost" || host === "127.0.0.1" || host === "[::1]" || host.startsWith("127.");
     const pathname =
       parsed.pathname === "/" ? "" : parsed.pathname.replace(/\/+$/, "") || parsed.pathname;
-    return `${parsed.protocol}//${parsed.host}${pathname}`;
+    const hostPort = isLoopbackHost
+      ? `127.0.0.1${parsed.port ? `:${parsed.port}` : ""}`
+      : parsed.host;
+    return `${parsed.protocol}//${hostPort}${pathname}`;
   } catch {
     return trimmed;
   }