Incorrect Form Submission Page Attribution in Marketo

Hello,

I’d like to open a discussion regarding an issue we’ve encountered with the attribution of form submission pages. We utilize global forms for various campaigns, such as webinars and content downloads. To ensure proper attribution to the relevant program, we've implemented a referrer constraint based on the URL.

However, we’re seeing instances where a form is filled out, but the referring page doesn’t have an embedded form. Consequently, when the lead is passed to Marketo, it is not being attributed to any program. This seems to be a disconnect between the form submission action and the referrer page recognition.

Has anyone experienced a similar issue or does anyone know how to resolve this kind of bug? Any insights or suggestions on how to ensure accurate form submission attribution would be greatly appreciated.