diff --git a/plugin/task_manager/cluster_comparison/cluster_comparison.go b/plugin/task_manager/cluster_comparison/cluster_comparison.go
index 9dcaf070..982419f2 100644
--- a/plugin/task_manager/cluster_comparison/cluster_comparison.go
+++ b/plugin/task_manager/cluster_comparison/cluster_comparison.go
@@ -56,9 +56,7 @@ func (p *processor) handleReadyMajorTask(taskItem *task.Task) error {
 		return nil
 	}
 	taskItem.RetryTimes++
-	if taskItem.StartTimeInMillis == 0 {
-		taskItem.StartTimeInMillis = time.Now().UnixMilli()
-	}
+	taskItem.StartTimeInMillis = time.Now().UnixMilli()
 	taskItem.Status = task.StatusRunning
 	taskItem.Metadata.Labels["total_diff_docs"] = 0
 	taskItem.Metadata.Labels["only_in_source"] = 0
diff --git a/plugin/task_manager/common_api.go b/plugin/task_manager/common_api.go
index 6bed3af8..e828a4a5 100644
--- a/plugin/task_manager/common_api.go
+++ b/plugin/task_manager/common_api.go
@@ -160,7 +160,11 @@ func (h *APIHandler) populateMajorTaskInfo(taskID string, sourceM util.MapStr) {
 			sourceM.Put("metadata.labels.source_total_docs", ts.SourceDocs)
 		}
 	case "cluster_comparison":
-		ts, _, err := h.getComparisonMajorTaskInfo(taskID)
+		targetTaskId := taskID
+		if repeatStatus.IsRepeat && repeatStatus.LastRunChildTaskID != "" {
+			targetTaskId = repeatStatus.LastRunChildTaskID
+		}
+		ts, _, err := h.getComparisonMajorTaskInfo(targetTaskId)
 		if err != nil {
 			log.Warnf("fetch progress info of task error: %v", err)
 			return