Previewing problem with custom fields

Hi,

I don’t know whether the problem described below is related to Gutenberg, ACF or Elementor. So, I’m reporting it to all sides.

I have created CPTs to which some custom fields are attached via ACF. The authors create custom posts, edit them in Gutenberg (they are not allowed to use Elementor) and fill in the custom fields. Each of these CPTs is handled by a corresponding Elementor model. This model dynamically retrieves the contents of the custom fields and display them.

Problem
While the posts are in draft mode in Gutenberg, previewing in Gutenberg is working fine. As soon as the post has been published, previewing in Gutenberg is no longer working correctly : all the elements displaying the custom field contents are empty in the preview. Switching back to draft mode makes the problem disappear.

However, the post is always displayed correctly in any case for the site visitors. Only the previewing doesn’t work.

I don’t understand where the problem could be.

Any idea ?

Thanks in advance.

Patrick