diff --git a/apps/api/src/api/v1/webhooks.py b/apps/api/src/api/v1/webhooks.py
index 87fd1a16..4f880968 100644
--- a/apps/api/src/api/v1/webhooks.py
+++ b/apps/api/src/api/v1/webhooks.py
@@ -2845,9 +2845,24 @@ async def alertmanager_webhook(
                 labels=dict(alert.labels) if alert.labels else {},
                 annotations=dict(alert.annotations) if alert.annotations else {},
             )
+            background_tasks.add_task(
+                notify_converged_alert_recurrence,
+                source="alertmanager",
+                fingerprint=fingerprint,
+                alertname=alertname,
+                severity=severity,
+                namespace=namespace,
+                target_resource=target_resource,
+                hit_count=2,
+                incident_id=None,
+                approval_id=None,
+                alert_category=alert_category,
+                notification_type=notification_type,
+                recurrence_stage="llm_inflight",
+            )
             return AlertResponse(
                 success=True,
-                message="🛡️ 告警已由同指紋背景 AI 分析處理中，跳過重複 LLM 呼叫",
+                message="🛡️ 告警已由同指紋背景 AI 分析處理中，已排程節流再通知",
                 alert_id=alert_id,
                 approval_created=False,
                 converged=True,
diff --git a/apps/api/src/services/converged_alert_recurrence_notifier.py b/apps/api/src/services/converged_alert_recurrence_notifier.py
index b2b06d28..a8df6f90 100644
--- a/apps/api/src/services/converged_alert_recurrence_notifier.py
+++ b/apps/api/src/services/converged_alert_recurrence_notifier.py
@@ -80,13 +80,27 @@ def format_converged_alert_recurrence_message(
     approval_id: str | None,
     alert_category: str = "",
     notification_type: str = "",
+    recurrence_stage: str = "converged",
 ) -> str:
     """Build a concise recurrence notice for an already-open alert fingerprint."""
 
+    is_llm_inflight = recurrence_stage == "llm_inflight"
+    title = "告警仍在發生：AI 分析中" if is_llm_inflight else "告警仍在發生"
+    summary = (
+        "同一指紋已有背景 AI 分析鎖，重複告警已節流提醒，不再完全靜音。"
+        if is_llm_inflight
+        else "同一指紋已收斂，系統保留去重，但不再完全靜音。"
+    )
+    next_step = (
+        "下一步：等待背景分析完成；若持續超過分析鎖 TTL，請查看 AwoooP 事件時間線與 API logs。"
+        if is_llm_inflight
+        else "下一步：請查看 AwoooP 事件時間線。"
+    )
+
     return "\n".join(
         [
-            "<b>告警仍在發生</b>",
-            "同一指紋已收斂，系統保留去重，但不再完全靜音。",
+            f"<b>{title}</b>",
+            summary,
             "",
             f"來源：<code>{shorten_alert_text(source, limit=40)}</code>",
             f"告警：<code>{shorten_alert_text(alertname, limit=80)}</code>",
@@ -99,7 +113,7 @@ def format_converged_alert_recurrence_message(
             f"分類：<code>{shorten_alert_text(alert_category or '-', limit=48)}</code>",
             f"通知型別：<code>{shorten_alert_text(notification_type or '-', limit=48)}</code>",
             "",
-            "下一步：請查看 AwoooP 事件時間線；這不是新的自動修復授權。",
+            f"{next_step} 這不是新的自動修復授權。",
         ]
     )
 
@@ -117,6 +131,7 @@ async def notify_converged_alert_recurrence(
     approval_id: str | None,
     alert_category: str = "",
     notification_type: str = "",
+    recurrence_stage: str = "converged",
 ) -> None:
     """Send a throttled recurrence notice for an already-open alert fingerprint."""
 
@@ -129,6 +144,7 @@ async def notify_converged_alert_recurrence(
             source=source,
             hit_count=hit_count,
             approval_id=approval_id,
+            recurrence_stage=recurrence_stage,
         )
         return
 
@@ -143,6 +159,7 @@ async def notify_converged_alert_recurrence(
         approval_id=approval_id,
         alert_category=alert_category,
         notification_type=notification_type,
+        recurrence_stage=recurrence_stage,
     )
 
     gateway = get_telegram_gateway()
@@ -158,6 +175,7 @@ async def notify_converged_alert_recurrence(
             "converged_alert_recurrence_primary_failed",
             source=source,
             approval_id=approval_id,
+            recurrence_stage=recurrence_stage,
             error=str(exc),
         )
 
@@ -172,6 +190,7 @@ async def notify_converged_alert_recurrence(
                 "converged_alert_recurrence_private_mirror_failed",
                 source=source,
                 approval_id=approval_id,
+                recurrence_stage=recurrence_stage,
                 error=str(exc),
             )
 
@@ -181,6 +200,7 @@ async def notify_converged_alert_recurrence(
             source=source,
             hit_count=hit_count,
             approval_id=approval_id,
+            recurrence_stage=recurrence_stage,
             mirrored_to_private=bool(private_chat_id and private_chat_id != gateway.alert_chat_id),
             sent_count=sent_count,
         )
@@ -190,5 +210,6 @@ async def notify_converged_alert_recurrence(
             source=source,
             hit_count=hit_count,
             approval_id=approval_id,
+            recurrence_stage=recurrence_stage,
             failures=failures,
         )
diff --git a/apps/api/tests/test_alert_converged_recurrence.py b/apps/api/tests/test_alert_converged_recurrence.py
index 317586b7..a2409fba 100644
--- a/apps/api/tests/test_alert_converged_recurrence.py
+++ b/apps/api/tests/test_alert_converged_recurrence.py
@@ -51,6 +51,29 @@ def test_converged_recurrence_message_escapes_html():
     assert "這不是新的自動修復授權" in text
 
 
+def test_converged_recurrence_message_supports_llm_inflight_state():
+    text = notifier.format_converged_alert_recurrence_message(
+        source="alertmanager",
+        alertname="PodCrashLoop<api>",
+        severity="warning",
+        namespace="awoooi-prod",
+        target_resource="api",
+        hit_count=2,
+        incident_id=None,
+        approval_id=None,
+        alert_category="kubernetes",
+        notification_type="TYPE-3",
+        recurrence_stage="llm_inflight",
+    )
+
+    assert "告警仍在發生：AI 分析中" in text
+    assert "背景 AI 分析鎖" in text
+    assert "PodCrashLoop&lt;api&gt;" in text
+    assert "事件：<code>-</code>" in text
+    assert "簽核：<code>-</code>" in text
+    assert "這不是新的自動修復授權" in text
+
+
 @pytest.mark.asyncio
 async def test_converged_recurrence_uses_redis_throttle(monkeypatch):
     redis = _FakeRedis(True)