Cannot show field group related to user when acf_form is called from a regular page

Reproducing the issue

WP

Create a regular WordPress page which we will use as a placeholder to edit profile data. Name that page Edit account.

THEME - On page.php, insert the code :

<?php acf_form([
    'post_id'  => 'user_1',
    'form'     => false,
    'return'   => null,
    'uploader' => 'basic',]); ?>

<?php echo "Just to make sure I am printed"; ?>

This template is used by the Edit account page created in step 1 and thus should show the form.

ACF SETUP

BROWSER

While logged-in, I refresh the "Edit account" page on the frontend.

The form does not show up at all.

ACF is not picking up the fact that I request to show all fields in the "user" context, even when not on a user form, even on that "edit account" page.

OBSERVATIONS

• I properly see my own debug text ("Just to make sure I am printed").
• The form is printed without any fields from the above group
• The form contains some fields which have never been set anywhere else (_validate_email)
• if I add a rule "OR current user is logged in" the form shows up (but that is too broad)

Reproduce the issue from the page.php example using acf_form with post_id set to user_1, then inspect how the form resolves field groups for a regular WordPress page. Done means the user-related field group appears on the frontend form without requiring the overly broad logged-in-user rule, while unrelated fields are not included.