diff --git a/src/daemon/ticker.py b/src/daemon/ticker.py
index a72a365..27c6f8f 100644
--- a/src/daemon/ticker.py
+++ b/src/daemon/ticker.py
@@ -395,10 +395,17 @@ class Ticker:
             return False
 
         now = datetime.utcnow().isoformat()
-        conn.execute(
-            "UPDATE tasks SET status=?, updated_at=? WHERE id=?",
-            (new_status, now, task_id),
-        )
+        # 重置到 pending 时清空 assignee（避免残留导致重复路由到同一 Agent）
+        if new_status == "pending":
+            conn.execute(
+                "UPDATE tasks SET status=?, assignee=NULL, updated_at=? WHERE id=?",
+                (new_status, now, task_id),
+            )
+        else:
+            conn.execute(
+                "UPDATE tasks SET status=?, updated_at=? WHERE id=?",
+                (new_status, now, task_id),
+            )
         event_type = f"task_{new_status}"
         if event_type not in EVENT_TYPES:
             event_type = "daemon_tick"