diff --git a/extensions/feishu/src/bot-group-name.test.ts b/extensions/feishu/src/bot-group-name.test.ts
index ac647ac26a7a..31e8157102ff 100644
--- a/extensions/feishu/src/bot-group-name.test.ts
+++ b/extensions/feishu/src/bot-group-name.test.ts
@@ -84,6 +84,37 @@ describe("resolveGroupName", () => {
     expect(mockGetChatInfo).toHaveBeenCalledOnce(); // only 1 API call
   });
 
+  it("does not cache group names when the expiry would exceed a valid Date", async () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date(8_640_000_000_000_000));
+    try {
+      mockGetChatInfo.mockResolvedValue({ name: "Boundary Group" });
+
+      const first = await resolveGroupName({ account, chatId: "oc_boundary", log });
+      const second = await resolveGroupName({ account, chatId: "oc_boundary", log });
+
+      expect(first).toBe("Boundary Group");
+      expect(second).toBe("Boundary Group");
+      expect(mockGetChatInfo).toHaveBeenCalledTimes(2);
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
+  it("evicts cached group names when the current clock is invalid", async () => {
+    mockGetChatInfo.mockResolvedValue({ name: "Cached Group" });
+    await resolveGroupName({ account, chatId: "oc_invalid_clock", log });
+    const dateNow = vi.spyOn(Date, "now").mockReturnValue(Number.NaN);
+    try {
+      const result = await resolveGroupName({ account, chatId: "oc_invalid_clock", log });
+
+      expect(result).toBe("Cached Group");
+    } finally {
+      dateNow.mockRestore();
+    }
+    expect(mockGetChatInfo).toHaveBeenCalledTimes(2);
+  });
+
   it("caches negative result (API failure) and skips retry", async () => {
     mockGetChatInfo.mockRejectedValue(new Error("fail"));
     await resolveGroupName({ account, chatId: "oc_test5", log });
diff --git a/extensions/feishu/src/bot.ts b/extensions/feishu/src/bot.ts
index 6ca5e65dfb21..c353f1dee6ba 100644
--- a/extensions/feishu/src/bot.ts
+++ b/extensions/feishu/src/bot.ts
@@ -10,7 +10,11 @@ import {
   resolveConfiguredBindingRoute,
   resolveRuntimeConversationBindingRoute,
 } from "openclaw/plugin-sdk/conversation-runtime";
-import { parseStrictNonNegativeInteger } from "openclaw/plugin-sdk/number-runtime";
+import {
+  asDateTimestampMs,
+  parseStrictNonNegativeInteger,
+  resolveExpiresAtMsFromDurationMs,
+} from "openclaw/plugin-sdk/number-runtime";
 import {
   DEFAULT_GROUP_HISTORY_LIMIT,
   createChannelHistoryWindow,
@@ -108,9 +112,14 @@ function isFeishuTopicSessionScope(scope: FeishuGroupSessionScope): boolean {
 }
 
 function evictGroupNameCache(): void {
-  const now = Date.now();
+  const now = asDateTimestampMs(Date.now());
+  if (now === undefined) {
+    groupNameCache.clear();
+    return;
+  }
   for (const [key, val] of groupNameCache) {
-    if (val.expiresAt <= now) {
+    const expiresAt = asDateTimestampMs(val.expiresAt);
+    if (expiresAt === undefined || expiresAt <= now) {
       groupNameCache.delete(key);
     }
   }
@@ -128,9 +137,12 @@ function evictGroupNameCache(): void {
   }
 }
 
-function setCacheEntry(key: string, value: { name: string; expiresAt: number }): void {
+function setCacheEntry(key: string, name: string): void {
+  const expiresAt = resolveExpiresAtMsFromDurationMs(GROUP_NAME_CACHE_TTL_MS);
   groupNameCache.delete(key);
-  groupNameCache.set(key, value);
+  if (expiresAt !== undefined) {
+    groupNameCache.set(key, { name, expiresAt });
+  }
 }
 
 export function clearGroupNameCache(): void {
@@ -150,37 +162,34 @@ export async function resolveGroupName(params: {
   const cacheKey = `${account.accountId}:${chatId}`;
 
   const cached = groupNameCache.get(cacheKey);
-  if (cached && cached.expiresAt > Date.now()) {
-    return cached.name || undefined;
+  if (cached) {
+    const now = asDateTimestampMs(Date.now());
+    const expiresAt = asDateTimestampMs(cached.expiresAt);
+    if (now !== undefined && expiresAt !== undefined && expiresAt > now) {
+      return cached.name || undefined;
+    }
+    groupNameCache.delete(cacheKey);
   }
 
+  let resolvedName: string | undefined;
   try {
     const client = createFeishuClient(account);
     const chatInfo = await getChatInfo(client, chatId);
     const name = chatInfo?.name?.trim();
     if (name) {
-      setCacheEntry(cacheKey, {
-        name,
-        expiresAt: Date.now() + GROUP_NAME_CACHE_TTL_MS,
-      });
+      setCacheEntry(cacheKey, name);
+      resolvedName = name;
     } else {
-      setCacheEntry(cacheKey, {
-        name: "",
-        expiresAt: Date.now() + GROUP_NAME_CACHE_TTL_MS,
-      });
+      setCacheEntry(cacheKey, "");
     }
   } catch (err) {
     log(`feishu[${account.accountId}]: getChatInfo failed for ${chatId}: ${String(err)}`);
-    setCacheEntry(cacheKey, {
-      name: "",
-      expiresAt: Date.now() + GROUP_NAME_CACHE_TTL_MS,
-    });
+    setCacheEntry(cacheKey, "");
   }
 
-  const result = groupNameCache.get(cacheKey)?.name || undefined;
   evictGroupNameCache();
 
-  return result;
+  return resolvedName;
 }
 
 async function resolveFeishuAudioPreflightTranscript(params: {