Revert the change of #5059 so we can improve it with #5625

Author: BalusC

impl/src/main/java/jakarta/faces/component/ComponentStateHelper.java

@@ -232,14 +232,14 @@ public void add(Serializable key, Object value) {
     }
 
     private void initList(Serializable key) {
+        if (component.initialStateMarked()) {
+            deltaMap.computeIfAbsent(key, e -> new ArrayList<>(4));
+        }
+
         if (get(key) == null) {
             List<Object> items = new ArrayList<>(4);
             defaultMap.put(key, items);
         }
-
-        if (component.initialStateMarked()) {
-            deltaMap.computeIfAbsent(key, e -> new ArrayList<>((List<Object>) get(key)));
-        }
     }
 
     /**