diff --git a/ClusterReceptor.cs b/ClusterReceptor.cs
index 48a2c85..b5aef2c 100644
--- a/ClusterReceptor.cs
+++ b/ClusterReceptor.cs
@@ -68,8 +68,12 @@ public class ClusterReceptor : Cluster, IReceptor {
             if (element is not Cluster clusterElement)
                 continue;
 
-            //receivers.AddRange(clusterElement.CollectReceivers());
-            foreach (Neuron output in clusterElement.outputs) {
+            foreach (Nucleus outputNucleus in clusterElement.clusterNuclei) {
+                if (outputNucleus is not Neuron output)
+                    continue;
+                    
+                // this should be clusterElement.outputs,
+                // but outputs is not updated when correctly and may contain old data...
                 foreach (Nucleus receiver in output.receivers) {
                     // Only add receivers outside clusterElement cluster
                     if (receiver.clusterPrefab != clusterElement.prefab &&
diff --git a/Editor/ClusterInspector.cs b/Editor/ClusterInspector.cs
index 7af110c..5c18824 100644
--- a/Editor/ClusterInspector.cs
+++ b/Editor/ClusterInspector.cs
@@ -322,7 +322,7 @@ public class ClusterInspector : Editor {
         }
 
         private void DrawReceivers(Nucleus nucleus, Vector3 parentPos, float size) {
-            List<Nucleus> receivers = null;
+            List<Nucleus> receivers;
             if (nucleus is Neuron neuron)
                 receivers = neuron.receivers;
             else if (nucleus is Cluster cluster)