So I have tried everything. But Forms never prefill on our landing pages. Here is an example below of a form on a landing page. The Landing page has no modifications after creation. It is completely base Marketo Landing Page. The form has no modifications. Simply created and approved.
I have checked my page. The cookie _mkto_trk exists. I have used the API to make a call and the cookie is mapped to my user. But the form never pre fills.
Any suggestions or insight would be greatly appreciated.