diff --git a/apps/api/src/services/telegram_gateway.py b/apps/api/src/services/telegram_gateway.py
index 7865f547..1f8d8185 100644
--- a/apps/api/src/services/telegram_gateway.py
+++ b/apps/api/src/services/telegram_gateway.py
@@ -4674,8 +4674,9 @@ class TelegramGateway:
 
             # 分散式鎖：同一心跳週期只有一個 replica 發報告
             # timeout=25*60 確保下一次心跳前鎖一定釋放（心跳間隔 30min）
+            # blocking_timeout=0: 鎖被佔用時立刻跳過，不排隊等待（避免多 replica 輪流發）
             try:
-                async with RedisLock("heartbeat:leader", timeout=25 * 60, blocking_timeout=5.0):
+                async with RedisLock("heartbeat:leader", timeout=25 * 60, blocking_timeout=0):
                     report = await HeartbeatReportService().collect()
                     text = report_to_telegram_html(report)