I have a page state which is a list of Data type cart_items. On action of a button, I am trying to add another data type object of the same type to the page state list. However there is weird thing happening. When I select the page state update type to "Add to List" and try to create an object of the Data type cart_items, I see option to "Set Fields" and in Available option set to No Further Changes which is good. But as I add a field using the set fields option, in the Available options, I don't get "No Further Changes" option.