diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
index 3c994491c..0ef3892e7 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
@@ -720,7 +720,10 @@ RED.editor = (function() {
                     if (typeof editing_node[d] === "string" || typeof editing_node[d] === "number") {
                         oldValues[d] = editing_node[d];
                     } else {
-                        oldValues[d] = $.extend(true,{},{v:editing_node[d]}).v;
+                        // Dont clone the group node `nodes` array
+                        if (editing_node.type !== 'group' || d !== "nodes") {
+                            oldValues[d] = $.extend(true,{},{v:editing_node[d]}).v;
+                        }
                     }
                 }
             }