diff --git a/src/main/java/eu/mihosoft/vrl/v3d/PropertyStorage.java b/src/main/java/eu/mihosoft/vrl/v3d/PropertyStorage.java
index 150bdaa5..0432f857 100644
--- a/src/main/java/eu/mihosoft/vrl/v3d/PropertyStorage.java
+++ b/src/main/java/eu/mihosoft/vrl/v3d/PropertyStorage.java
@@ -33,12 +33,15 @@
  */
 package eu.mihosoft.vrl.v3d;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
 
+import com.sun.xml.internal.bind.v2.schemagen.xmlschema.List;
+
 import javafx.scene.paint.Color;
 
 /**
@@ -122,6 +125,11 @@ public void syncProperties(PropertyStorage dying) {
     			HashSet<String> clonedSet =  new HashSet<String>();
     			clonedSet.addAll((HashSet<String>)property);
     			property=clonedSet;	
+    		}
+    		if(ArrayList.class.isInstance(property)) {
+    			ArrayList<String> clonedSet =  new ArrayList<String>();
+    			clonedSet.addAll((ArrayList<String>)property);
+    			property=clonedSet;	
     		}
 			set(o,property);
     	}