When you close the child form (Esc) and go back to parent form the parent form is still in original state. Its content is not refreshed (not even display methods) until you manually click Refresh. No method/event is triggered on the parent form to achieve that by code.

I would suggest one of following solutions:
A) Call form activate() or some similar event/method when parent form is shown again.
B) Add RefreshOnComeBack property on FormMenuFunctionButtonControl to automatically refresh the parent form when child form is closed