Widget doesnot work with input fields that doesnot use $this->get_field_name

hi,

for some reason, I need to have an input field

on the form of the widget.

The name attribute for this input is generated using $this->get_field_name() method. Now, when I have this input field on the form, the ‘Done’ button on the modal window doesnot work. The modal window doesnot work.

Any help would be appreciated.
Thanks