use offset from create item

src/components/ContainmentCanvas/ContainmentCanvas.jsx

@@ -57,8 +57,8 @@ const canvasTarget = {
 
             name = getIndexedName(name, getChildrenNames(props.gmeClient, props.activeNode));
 
-            position.x -= dragItem.nodeData.bbox.width / 2;
-            position.y -= dragItem.nodeData.bbox.height / 2;
+            position.x -= dragItem.nodeData.offset.x / 2;
+            position.y -= dragItem.nodeData.offset.y / 2;
 
             position.x = Math.trunc(position.x);
             position.y = Math.trunc(position.y);