diff --git a/CHANGELOG.md b/CHANGELOG.md
index edad4daaf20..6194a9709b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@ Docs: https://docs.openclaw.ai
 - fix(bluebubbles): replay missed webhook messages after gateway restart via a persistent per-account cursor and `/api/v1/message/query?after=<ts>` pass, so messages delivered while the gateway was down no longer disappear. Uses the existing `processMessage` path and is deduped by #66816's inbound GUID cache. (#66857, #66721) Thanks @omarshahine.
 - Telegram/native commands: keep Telegram command-sync cache process-local so gateway restarts re-register the menu instead of trusting stale on-disk sync state after Telegram cleared commands out-of-band. (#66730) Thanks @nightq.
 - Audio/self-hosted STT: restore `models.providers.*.request.allowPrivateNetwork` for audio transcription so private or LAN speech-to-text endpoints stop tripping SSRF blocks after the v2026.4.14 regression. (#66692) Thanks @jhsmith409.
+- QQBot/cron: guard against undefined `event.content` in `parseFaceTags` and `filterInternalMarkers` so cron-triggered agent turns with no content payload no longer crash with `TypeError: Cannot read properties of undefined (reading 'startsWith')`. (#66302) Thanks @xinmotlanthua.
 
 ## 2026.4.14
 
diff --git a/extensions/qqbot/src/utils/text-parsing.test.ts b/extensions/qqbot/src/utils/text-parsing.test.ts
index 451ca2e3111..a48a540c99d 100644
--- a/extensions/qqbot/src/utils/text-parsing.test.ts
+++ b/extensions/qqbot/src/utils/text-parsing.test.ts
@@ -2,6 +2,18 @@ import { describe, expect, it, vi } from "vitest";
 import { parseFaceTags } from "./text-parsing.js";
 
 describe("parseFaceTags", () => {
+  it("returns empty string when input is undefined", () => {
+    expect(parseFaceTags(undefined)).toBe("");
+  });
+
+  it("returns empty string when input is null", () => {
+    expect(parseFaceTags(null)).toBe("");
+  });
+
+  it("returns empty string when input is empty string", () => {
+    expect(parseFaceTags("")).toBe("");
+  });
+
   it("skips oversized base64 ext payloads before decoding", () => {
     const oversizedBase64 = "A".repeat(100_000);
     const tag = `<faceType=1,faceId="1",ext="${oversizedBase64}">`;
diff --git a/extensions/qqbot/src/utils/text-parsing.ts b/extensions/qqbot/src/utils/text-parsing.ts
index 7722bfd04c6..5cec13dda9a 100644
--- a/extensions/qqbot/src/utils/text-parsing.ts
+++ b/extensions/qqbot/src/utils/text-parsing.ts
@@ -5,9 +5,9 @@ import type { RefAttachmentSummary } from "../ref-index-store.js";
 const MAX_FACE_EXT_BYTES = 64 * 1024;
 
 /** Replace QQ face tags with readable text labels. */
-export function parseFaceTags(text: string): string {
+export function parseFaceTags(text: string | undefined | null): string {
   if (!text) {
-    return text;
+    return "";
   }
 
   return text.replace(/<faceType=\d+,faceId="[^"]*",ext="([^"]*)">/g, (_match, ext: string) => {
@@ -26,9 +26,9 @@ export function parseFaceTags(text: string): string {
 }
 
 /** Remove internal framework markers before sending text outward. */
-export function filterInternalMarkers(text: string): string {
+export function filterInternalMarkers(text: string | undefined | null): string {
   if (!text) {
-    return text;
+    return "";
   }
 
   let result = text.replace(/\[\[[a-z_]+:\s*[^\]]*\]\]/gi, "");