diff --git a/backend/mpc-system/services/server-party/adapters/output/grpc/message_router_client.go b/backend/mpc-system/services/server-party/adapters/output/grpc/message_router_client.go
index 05241808..ad5aeacd 100644
--- a/backend/mpc-system/services/server-party/adapters/output/grpc/message_router_client.go
+++ b/backend/mpc-system/services/server-party/adapters/output/grpc/message_router_client.go
@@ -268,7 +268,8 @@ func (c *MessageRouterClient) GetPendingMessages(
 
 			// Send acknowledgment for each received message
 			go func(messageID, sessionIDStr, pID string) {
-				ackCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+				// Use parent context to allow proper cancellation
+				ackCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
 				defer cancel()
 				sid, _ := uuid.Parse(sessionIDStr)
 				if err := c.AcknowledgeMessage(ackCtx, messageID, sid, pID, true, ""); err != nil {