Comment to BUG: popup web forms
-
That does not look like it is in a popup.
Yes, it's not a popup but "the form is loaded dynamically through ajax" and has necessary elements as you described:
JavaScript controlled inputs do not. So headers (stop expanding and collapsing) and switchers wont switch. This happens when the form is loaded dynamically through ajax.
May I see and test the popup you're saying about?