diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ad95bfcc..674821df1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,7 @@ Docs: https://docs.openclaw.ai
 - Slack: detect control commands when channel messages start with bot mention prefixes (for example, `@Bot /new`). (#14142) Thanks @beefiker.
 - Signal: enforce E.164 validation for the Signal bot account prompt so mistyped numbers are caught early. (#15063) Thanks @Duartemartins.
 - Discord: process DM reactions instead of silently dropping them. (#10418) Thanks @mcaxtr.
+- Heartbeat: filter noise-only system events so scheduled reminder notifications do not fire when cron runs carry only heartbeat markers. (#13317) Thanks @pvtclawn.
 - Signal: render mention placeholders as `@uuid`/`@phone` so mention gating and Clawdbot targeting work. (#2013) Thanks @alexgleason.
 - Discord: omit empty content fields for media-only messages while preserving caption whitespace. (#9507) Thanks @leszekszpunar.
 - Onboarding/Providers: add Z.AI endpoint-specific auth choices (`zai-coding-global`, `zai-coding-cn`, `zai-global`, `zai-cn`) and expand default Z.AI model wiring. (#13456) Thanks @tomsun28.
diff --git a/src/infra/heartbeat-runner.cron-system-event-filter.test.ts b/src/infra/heartbeat-runner.cron-system-event-filter.test.ts
index d83e04d98..dfe4c2c18 100644
--- a/src/infra/heartbeat-runner.cron-system-event-filter.test.ts
+++ b/src/infra/heartbeat-runner.cron-system-event-filter.test.ts
@@ -11,6 +11,8 @@ describe("isCronSystemEvent", () => {
     expect(isCronSystemEvent("HEARTBEAT_OK")).toBe(false);
     expect(isCronSystemEvent("HEARTBEAT_OK 🦞")).toBe(false);
     expect(isCronSystemEvent("heartbeat_ok")).toBe(false);
+    expect(isCronSystemEvent("HEARTBEAT_OK:")).toBe(false);
+    expect(isCronSystemEvent("HEARTBEAT_OK, continue")).toBe(false);
   });
 
   it("returns false for heartbeat poll and wake noise", () => {
diff --git a/src/infra/heartbeat-runner.ghost-reminder.test.ts b/src/infra/heartbeat-runner.ghost-reminder.test.ts
index 54a3d0bdb..76bcaf22f 100644
--- a/src/infra/heartbeat-runner.ghost-reminder.test.ts
+++ b/src/infra/heartbeat-runner.ghost-reminder.test.ts
@@ -135,6 +135,9 @@ describe("Ghost reminder bug (issue #13317)", () => {
       const calledCtx = getReplySpy.mock.calls[0]?.[0];
       expect(calledCtx?.Provider).toBe("cron-event");
       expect(calledCtx?.Body).toContain("scheduled reminder has been triggered");
+      expect(calledCtx?.Body).toContain("Reminder: Check Base Scout results");
+      expect(calledCtx?.Body).not.toContain("HEARTBEAT_OK");
+      expect(calledCtx?.Body).not.toContain("heartbeat poll");
       expect(sendTelegram).toHaveBeenCalled();
     } finally {
       await fs.rm(tmpDir, { recursive: true, force: true });
@@ -170,6 +173,9 @@ describe("Ghost reminder bug (issue #13317)", () => {
       const calledCtx = getReplySpy.mock.calls[0]?.[0];
       expect(calledCtx?.Provider).toBe("cron-event");
       expect(calledCtx?.Body).toContain("scheduled reminder has been triggered");
+      expect(calledCtx?.Body).toContain("Reminder: Check Base Scout results");
+      expect(calledCtx?.Body).not.toContain("HEARTBEAT_OK");
+      expect(calledCtx?.Body).not.toContain("heartbeat poll");
       expect(sendTelegram).toHaveBeenCalled();
     } finally {
       await fs.rm(tmpDir, { recursive: true, force: true });
diff --git a/src/infra/heartbeat-runner.ts b/src/infra/heartbeat-runner.ts
index af4caf071..cec770f24 100644
--- a/src/infra/heartbeat-runner.ts
+++ b/src/infra/heartbeat-runner.ts
@@ -114,26 +114,47 @@ function buildCronEventPrompt(pendingEvents: string[]): string {
   );
 }
 
-// Returns true when a system event should be treated as real cron reminder content.
-export function isCronSystemEvent(evt: string) {
+const HEARTBEAT_OK_PREFIX = HEARTBEAT_TOKEN.toLowerCase();
+
+// Detect heartbeat-specific noise so cron reminders don't trigger on non-reminder events.
+function isHeartbeatAckEvent(evt: string): boolean {
   const trimmed = evt.trim();
   if (!trimmed) {
     return false;
   }
-
   const lower = trimmed.toLowerCase();
-  const heartbeatOk = HEARTBEAT_TOKEN.toLowerCase();
-  if (lower === heartbeatOk || lower.startsWith(`${heartbeatOk} `)) {
+  if (!lower.startsWith(HEARTBEAT_OK_PREFIX)) {
     return false;
   }
-  if (lower.includes("heartbeat poll") || lower.includes("heartbeat wake")) {
-    return false;
-  }
-  if (lower.includes("exec finished")) {
-    return false;
+  const suffix = lower.slice(HEARTBEAT_OK_PREFIX.length);
+  if (suffix.length === 0) {
+    return true;
   }
+  return !/[a-z0-9_]/.test(suffix[0]);
+}
 
-  return true;
+function isHeartbeatNoiseEvent(evt: string): boolean {
+  const lower = evt.trim().toLowerCase();
+  if (!lower) {
+    return false;
+  }
+  return (
+    isHeartbeatAckEvent(lower) ||
+    lower.includes("heartbeat poll") ||
+    lower.includes("heartbeat wake")
+  );
+}
+
+function isExecCompletionEvent(evt: string): boolean {
+  return evt.toLowerCase().includes("exec finished");
+}
+
+// Returns true when a system event should be treated as real cron reminder content.
+export function isCronSystemEvent(evt: string) {
+  if (!evt.trim()) {
+    return false;
+  }
+  return !isHeartbeatNoiseEvent(evt) && !isExecCompletionEvent(evt);
 }
 
 type HeartbeatAgentState = {
@@ -521,12 +542,13 @@ export async function runHeartbeatOnce(opts: {
   const isExecEvent = opts.reason === "exec-event";
   const isCronEvent = Boolean(opts.reason?.startsWith("cron:"));
   const pendingEvents = isExecEvent || isCronEvent ? peekSystemEvents(sessionKey) : [];
-  const hasExecCompletion = pendingEvents.some((evt) => evt.includes("Exec finished"));
-  const hasCronEvents = isCronEvent && pendingEvents.some((evt) => isCronSystemEvent(evt));
+  const cronEvents = pendingEvents.filter((evt) => isCronSystemEvent(evt));
+  const hasExecCompletion = pendingEvents.some(isExecCompletionEvent);
+  const hasCronEvents = isCronEvent && cronEvents.length > 0;
   const prompt = hasExecCompletion
     ? EXEC_EVENT_PROMPT
     : hasCronEvents
-      ? buildCronEventPrompt(pendingEvents)
+      ? buildCronEventPrompt(cronEvents)
       : resolveHeartbeatPrompt(cfg, heartbeat);
   const ctx = {
     Body: appendCronStyleCurrentTimeLine(prompt, cfg, startedAt),