diff --git a/extensions/feishu/src/probe.test.ts b/extensions/feishu/src/probe.test.ts
index adcb8406e603..787048aeea73 100644
--- a/extensions/feishu/src/probe.test.ts
+++ b/extensions/feishu/src/probe.test.ts
@@ -187,6 +187,32 @@ describe("probeFeishu", () => {
     expect(requestFn).toHaveBeenCalledTimes(1);
   });
 
+  it("does not cache probe results when the expiry would exceed a valid Date", async () => {
+    await withFakeTimers(async () => {
+      vi.setSystemTime(new Date(8_640_000_000_000_000));
+      const requestFn = setupSuccessClient();
+
+      const { first, second } = await readSequentialDefaultProbePair();
+
+      expect(first).toEqual(second);
+      expect(requestFn).toHaveBeenCalledTimes(2);
+    });
+  });
+
+  it("evicts cached probe results when the current clock is invalid", async () => {
+    const requestFn = setupSuccessClient();
+
+    await probeFeishu(DEFAULT_CREDS);
+    const dateNow = vi.spyOn(Date, "now").mockReturnValue(Number.NaN);
+    try {
+      await probeFeishu(DEFAULT_CREDS);
+    } finally {
+      dateNow.mockRestore();
+    }
+
+    expect(requestFn).toHaveBeenCalledTimes(2);
+  });
+
   it("makes a fresh API call after cache expires", async () => {
     await withFakeTimers(async () => {
       const requestFn = setupSuccessClient();
diff --git a/extensions/feishu/src/probe.ts b/extensions/feishu/src/probe.ts
index 766677793ff8..7a4ec424015f 100644
--- a/extensions/feishu/src/probe.ts
+++ b/extensions/feishu/src/probe.ts
@@ -1,4 +1,8 @@
 import { formatErrorMessage } from "openclaw/plugin-sdk/error-runtime";
+import {
+  asDateTimestampMs,
+  resolveExpiresAtMsFromDurationMs,
+} from "openclaw/plugin-sdk/number-runtime";
 import { raceWithTimeoutAndAbort } from "./async.js";
 import { createFeishuClient, type FeishuClientCredentials } from "./client.js";
 import type { FeishuProbeResult } from "./types.js";
@@ -38,7 +42,12 @@ function setCachedProbeResult(
   result: FeishuProbeResult,
   ttlMs: number,
 ): FeishuProbeResult {
-  probeCache.set(cacheKey, { result, expiresAt: Date.now() + ttlMs });
+  const expiresAt = resolveExpiresAtMsFromDurationMs(ttlMs);
+  if (expiresAt === undefined) {
+    probeCache.delete(cacheKey);
+    return result;
+  }
+  probeCache.set(cacheKey, { result, expiresAt });
   if (probeCache.size > MAX_PROBE_CACHE_SIZE) {
     const oldest = probeCache.keys().next().value;
     if (oldest !== undefined) {
@@ -74,8 +83,13 @@ export async function probeFeishu(
   // pollute each other's cache entry.
   const cacheKey = creds.accountId ?? `${creds.appId}:${creds.appSecret.slice(0, 8)}`;
   const cached = probeCache.get(cacheKey);
-  if (cached && cached.expiresAt > Date.now()) {
-    return cached.result;
+  if (cached) {
+    const now = asDateTimestampMs(Date.now());
+    const expiresAt = asDateTimestampMs(cached.expiresAt);
+    if (now !== undefined && expiresAt !== undefined && expiresAt > now) {
+      return cached.result;
+    }
+    probeCache.delete(cacheKey);
   }
 
   try {