diff --git a/src/Components/Editor/Actions/ContainerOperations.ts b/src/Components/Editor/Actions/ContainerOperations.ts
index d0dc7e4..4a05dfa 100644
--- a/src/Components/Editor/Actions/ContainerOperations.ts
+++ b/src/Components/Editor/Actions/ContainerOperations.ts
@@ -461,7 +461,9 @@ function ApplyAddMethod(
 ): number {
   if (index > 0 && (
     containerConfig.AddMethod === undefined ||
-    containerConfig.AddMethod === AddMethod.Append)) {
+    containerConfig.AddMethod === null ||
+    containerConfig.AddMethod === AddMethod.Append
+  )) {
     // Append method (default)
     const lastChild: IContainerModel | undefined = parent.children
       .at(index - 1);