diff --git a/internal/querycoordv2/task/scheduler.go b/internal/querycoordv2/task/scheduler.go
index 902c8fd1bd216..c7379da43712a 100644
--- a/internal/querycoordv2/task/scheduler.go
+++ b/internal/querycoordv2/task/scheduler.go
@@ -287,6 +287,7 @@ func (scheduler *taskScheduler) Add(task Task) error {
 	}
 
 	scheduler.taskStats.Add(task.ID(), task)
+	scheduler.updateTaskMetrics()
 	log.Ctx(task.Context()).Info("task added", zap.String("task", task.String()))
 	task.RecordStartTs()
 	return nil