how to update widget with elementor_ajax action

I have built a regular wp widget that has a field that pops up in a lightbox(fancybox)
the problem is when i change this field in the lightbox it doesn’t update the widget with the elementor_ajax action with (render_widget action) because fancybox takes the field outside the widget container div, so how can i run this function in the current opened widget so i can update it manually.
Thanks in advance.