The forms has a number of fields included, some are mapped to contact entity and some are mapped to lead entity. Users are sent an email via a journey, however only the fields mapped to contacts are displaying with prefilled user data, why would this happen? The form is set to allow prefill, the users have data associated to these fields, and each field on the form has prefill enabled. Yet still the form largely appears blank except for first and last name mapped to the contact.
Is this a bug or is prefill not designed to work with data associated with leads?