diff --git a/task/processor/processor.go b/task/processor/processor.go
index c78a8ad2..cd08698f 100644
--- a/task/processor/processor.go
+++ b/task/processor/processor.go
@@ -66,6 +66,9 @@ func (r *processor) process(taskID common.Hash) error {
 		slog.Error("failed to handle task", "error", err)
 		return err
 	}
+	if len(proof) == 0 {
+		return nil
+	}
 	processTime := time.Since(startTime)
 	slog.Info("process task success", "project_id", t.ProjectID.String(), "task_id", t.ID, "process_time", processTime)
 	metrics.TaskDurationMtc.WithLabelValues(t.ProjectID.String(), t.ProjectVersion, t.ID.String()).Set(processTime.Seconds())
diff --git a/vm/payload.go b/vm/payload.go
index 0bd81bca..8be4b6c2 100644
--- a/vm/payload.go
+++ b/vm/payload.go
@@ -132,6 +132,10 @@ func encodeMovementPayload(task *task.Task, projectConfig *project.Config) ([]by
 	slog.Info("------", "lastPayload", string(task.PrevTask.Payload))
 	slog.Info("------", "curPayload", string(task.Payload))
 
+	if isMove == 0 {
+		return nil, nil
+	}
+
 	assignment := ProofofMovementCircuit{
 		LastPayloadHash: uints.NewU8Array(lastPayloadHash[:]),
 		LastTimestamp:   lastTimestamp,
diff --git a/vm/vm.go b/vm/vm.go
index 86f97b26..a05a2126 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -34,6 +34,9 @@ func (r *Handler) Handle(task *task.Task, projectConfig *project.Config) ([]byte
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to load payload")
 	}
+	if len(taskPayload) == 0 {
+		return nil, nil
+	}
 	conn, ok := r.vmClients[projectConfig.VMTypeID]
 	if !ok {
 		return nil, errors.Errorf("unsupported vm type id %d", projectConfig.VMTypeID)