Passing Dynamic Data to a Lightbox Form

My customers will be submitting an answer to a question on a page via a form in a light box. The page has numerous fields populated by dynamic data which is filtered on the dataset to that page’s specific dataset entry. I need some of that dynamic data to auto populate hidden fields on the form in the lightbox for submission.

I’m currently grabbing the data and storing it in the session and recalling it in the lightbox form where it autofill’s the necessary inputs. The problem I’m having is if I use the demo feature when developing it works flawlessly but when I try it as an actual member it doesn’t pass the dynamic data. Instead it passes the default values for the linked textboxes. For example, the Title box is linked to dynamic data and so when I test it in developer mode I get that dynamic data I should but when I test as a user it literally just says “Title”.

I’ve tried passing through plain (non-dynamic) data from the page and it works fine. Something about the dynamic data is not letting me store and recall it I think.