New responsive form designer, loading box

Hi,

I am building a Nintex Form with the new responsive form builder.

When I click "New" for a SharePoint list, while the form is loading, it just shows a rectangle for some seconds like you see in the screenshot. After a few seconds the form loads.

Is it possible to add some kind of text like "Loading" into it to not confuse the users that want to use the form?

How can I achieve this?

Thanks in advance.

Wouter