diff --git a/apps/api/src/api/v1/webhooks.py b/apps/api/src/api/v1/webhooks.py
index e86950f11..c73255a0e 100644
--- a/apps/api/src/api/v1/webhooks.py
+++ b/apps/api/src/api/v1/webhooks.py
@@ -841,26 +841,19 @@ async def receive_alert(
 
             if updated_approval:
                 # =================================================================
-                # [關鍵修復] 收斂告警也必須推送 Telegram (BackgroundTasks)
+                # 2026-03-27 ogt: 收斂告警不重複發送 Telegram，只更新 hit_count
+                # 避免 Telegram 洗版，用戶可在 UI 查看聚合次數
                 # =================================================================
-                background_tasks.add_task(
-                    _push_to_telegram_background,
+                logger.info(
+                    "alert_converged_telegram_skipped",
                     approval_id=str(updated_approval.id),
-                    risk_level=updated_approval.risk_level.value,
-                    resource_name=alert.target_resource,
-                    root_cause=alert.message,
-                    suggested_action=updated_approval.action,
-                    estimated_downtime="~30s",
                     hit_count=updated_approval.hit_count,
-                    # v6.0 AI 仲裁 (收斂告警使用 COLLAB，因為跳過 LLM)
-                    primary_responsibility="COLLAB",
-                    confidence=0.70,  # 收斂告警標準信心度
-                    namespace=alert.namespace,
+                    reason="Converged alert - Telegram already sent for this fingerprint",
                 )
 
                 return AlertResponse(
                     success=True,
-                    message=f"🛡️ 告警收斂：相同指紋告警已聚合 (x{updated_approval.hit_count}次)，跳過 LLM",
+                    message=f"🛡️ 告警收斂 (x{updated_approval.hit_count}) - Telegram 已發送，跳過重複通知",
                     alert_id=alert_id,
                     approval_created=False,  # 未建立新卡片
                     approval_id=str(updated_approval.id),
@@ -1223,23 +1216,18 @@ async def alertmanager_webhook(
 
             updated_approval = await service.increment_hit_count(existing_approval.id)
             if updated_approval:
-                background_tasks.add_task(
-                    _push_to_telegram_background,
+                # 2026-03-27 ogt: 收斂告警不重複發送 Telegram，只更新 hit_count
+                # 用戶可在 UI 查看聚合次數，避免 Telegram 洗版
+                logger.info(
+                    "alertmanager_converged_telegram_skipped",
                     approval_id=str(updated_approval.id),
-                    risk_level=updated_approval.risk_level.value,
-                    resource_name=target_resource,
-                    root_cause=message,
-                    suggested_action=updated_approval.action,
-                    estimated_downtime="~30s",
                     hit_count=updated_approval.hit_count,
-                    primary_responsibility="COLLAB",
-                    confidence=0.70,
-                    namespace=namespace,
+                    reason="Converged alert - Telegram already sent for this fingerprint",
                 )
 
                 return AlertResponse(
                     success=True,
-                    message=f"🛡️ 告警收斂 (x{updated_approval.hit_count})",
+                    message=f"🛡️ 告警收斂 (x{updated_approval.hit_count}) - Telegram 已發送，跳過重複通知",
                     alert_id=alert_id,
                     approval_created=False,
                     approval_id=str(updated_approval.id),