diff --git a/pkg/controller/studyjob/studyjob_controller.go b/pkg/controller/studyjob/studyjob_controller.go
index eb6bc8e5ecc..1f70f2ca772 100644
--- a/pkg/controller/studyjob/studyjob_controller.go
+++ b/pkg/controller/studyjob/studyjob_controller.go
@@ -348,28 +348,23 @@ func (r *ReconcileStudyJobController) updateWorker(c katibapi.ManagerClient, ins
 			if ctime != nil && cjob.Status.LastScheduleTime != nil {
 				if ctime.Before(cjob.Status.LastScheduleTime) && len(cjob.Status.Active) == 0 {
 					saveModel(c, instance.Status.StudyID, instance.Status.Trials[i].TrialID, wid)
-					instance.Status.Trials[i].WorkerList[j].Condition = katibv1alpha1.ConditionCompleted
-					instance.Status.Trials[i].WorkerList[j].CompletionTime = metav1.Now()
 					update = true
-					_, err := c.UpdateWorkerState(
-						context.Background(),
-						&katibapi.UpdateWorkerStateRequest{
-							WorkerId: instance.Status.Trials[i].WorkerList[j].WorkerID,
-							Status:   katibapi.State_COMPLETED,
-						})
-					if err != nil {
-						log.Printf("Fail to update worker info. ID %s", instance.Status.Trials[i].WorkerList[j].WorkerID)
-						return false, err
-					}
 					susp := true
 					cjob.Spec.Suspend = &susp
 					if err := r.Update(context.TODO(), cjob); err != nil {
 						return false, err
 					}
-
-					cwids = append(cwids, wid)
 				}
 			}
+		} else {
+		// for some reason, metricsCollector for this worker cannot be found (deleted by anyone accidentally or even failed to be created)
+			update = true
+			instance.Status.Condition = katibv1alpha1.ConditionFailed
+		}
+		if update {
+			instance.Status.Trials[i].WorkerList[j].Condition = katibv1alpha1.ConditionCompleted
+			instance.Status.Trials[i].WorkerList[j].CompletionTime = metav1.Now()
+			cwids = append(cwids, wid)
 		}
 	case katibapi.State_RUNNING:
 		if instance.Status.Trials[i].WorkerList[j].Condition != katibv1alpha1.ConditionRunning {
@@ -377,28 +372,23 @@ func (r *ReconcileStudyJobController) updateWorker(c katibapi.ManagerClient, ins
 			update = true
 		}
 		if errors.IsNotFound(cjoberr) {
-			r.spawnMetricsCollector(instance, c, instance.Status.StudyID, instance.Status.Trials[i].TrialID, wid, ns, instance.Spec.MetricsCollectorSpec)
-		}
-		_, err := c.UpdateWorkerState(
-			context.Background(),
-			&katibapi.UpdateWorkerStateRequest{
-				WorkerId: instance.Status.Trials[i].WorkerList[j].WorkerID,
-				Status:   katibapi.State_RUNNING,
-			})
-		if err != nil {
-			log.Printf("Fail to update worker info. ID %s", instance.Status.Trials[i].WorkerList[j].WorkerID)
-			return false, err
+			spawnErr := r.spawnMetricsCollector(instance, c, instance.Status.StudyID, instance.Status.Trials[i].TrialID, wid, ns, instance.Spec.MetricsCollectorSpec)
+			if spawnErr != nil {
+				instance.Status.Condition = katibv1alpha1.ConditionFailed
+			}
 		}
 	case katibapi.State_ERROR:
 		if instance.Status.Trials[i].WorkerList[j].Condition != katibv1alpha1.ConditionFailed {
 			instance.Status.Trials[i].WorkerList[j].Condition = katibv1alpha1.ConditionFailed
 			update = true
 		}
+	}
+	if update {
 		_, err := c.UpdateWorkerState(
 			context.Background(),
 			&katibapi.UpdateWorkerStateRequest{
 				WorkerId: instance.Status.Trials[i].WorkerList[j].WorkerID,
-				Status:   katibapi.State_ERROR,
+				Status: status.WorkerState,
 			})
 		if err != nil {
 			log.Printf("Fail to update worker info. ID %s", instance.Status.Trials[i].WorkerList[j].WorkerID)
@@ -613,17 +603,14 @@ func (r *ReconcileStudyJobController) spawnWorker(instance *katibv1alpha1.StudyJ
 	BUFSIZE := 1024
 	job := createWorkerJobObj(wkind)
 	if err := k8syaml.NewYAMLOrJSONDecoder(wm, BUFSIZE).Decode(job); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("Yaml decode error %v", err)
 		return "", err
 	}
 	if err := controllerutil.SetControllerReference(instance, job.(metav1.Object), r.scheme); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("SetControllerReference error %v", err)
 		return "", err
 	}
 	if err := r.Create(context.TODO(), job); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("Job Create error %v", err)
 		return "", err
 	}
@@ -637,7 +624,6 @@ func (r *ReconcileStudyJobController) spawnMetricsCollector(instance *katibv1alp
 	wkind, err := getWorkerKind(instance.Spec.WorkerSpec)
 	if err != nil {
 		log.Printf("getWorkerKind error %v", err)
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		return err
 	}
 	mcm, err := getMetricsCollectorManifest(studyID, trialID, workerID, wkind, namespace, mcs)
@@ -647,19 +633,16 @@ func (r *ReconcileStudyJobController) spawnMetricsCollector(instance *katibv1alp
 	}
 
 	if err := k8syaml.NewYAMLOrJSONDecoder(mcm, BUFSIZE).Decode(&mcjob); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("MetricsCollector Yaml decode error %v", err)
 		return err
 	}
 
 	if err := controllerutil.SetControllerReference(instance, &mcjob, r.scheme); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("MetricsCollector SetControllerReference error %v", err)
 		return err
 	}
 
 	if err := r.Create(context.TODO(), &mcjob); err != nil {
-		instance.Status.Condition = katibv1alpha1.ConditionFailed
 		log.Printf("MetricsCollector Job Create error %v", err)
 		return err
 	}