Can't pre-fill form fields with procedure described in Mautic documentation

Hi

I am having a similar challenge here. I have done research and found a few posts on this (How to pre populate a form with an email address for idiots like me. amount others) and still I am not getting the desired behaviour :frowning:

I have created a form with email and made behaviour Auto-Fill Data:
image

I also made sure that the email field in Custom Fields is set to Publicly Updatable:

I created an email with the link https://mydomain.com/form_landingpage.html?email={leadfield=email|true}
Sent this mailer, clicked, and e-mail was not repopulated.
Then went and tried with contact field instead of lead field.
https://mydomain.com/form_landingpage.html?email={contactfield=email|true}

Same - not populated.

Checked the code that is manually generated from Form:


Any insights to what I am missing would be great.

Thanks in advance