diff --git a/lib/src/form/src/form_group_wrapper.dart b/lib/src/form/src/form_group_wrapper.dart
index 5e2254b..9648374 100644
--- a/lib/src/form/src/form_group_wrapper.dart
+++ b/lib/src/form/src/form_group_wrapper.dart
@@ -115,7 +115,11 @@ class _FormGroupWrapperState extends State<FormGroupWrapper> {
       List<Widget>.generate(instances.length, (int i) => widget.itemBuilder(i, instances[i].composedID, () => _removeItem(i))),
       // Add Callback
       () {
-        return widget.formController.addInstanceToFormGroup(widget.groupID);
+        String id = '';
+        setState(() {
+          id = widget.formController.addInstanceToFormGroup(widget.groupID);
+        });
+        return id;
       },
       // Remove Callback
       (int i) => _removeItem(i),