Issues with generate_post_author_output

Hello,
thanks for your attention.

Here is an example where the hook is not working:
https://napoli.cityrumors.it/2024/07/31/devi-muoverti-in-treno-ad-agosto-da-napoli-sara-una-tragedia/

In the entry-meta, there is the date and the author. In contrast, here is an example where the hook is working correctly:
https://www.computer-idea.it/svegliati-con-la-tua-canzone-preferita-tutti-i-passaggi-in-questa-guida/

In the entry-meta, you can see “scritto da” and “a cura di,” which is the expected behavior.

Both configurations are the same with no additional plugins or GP blocks.

Is there a way to debug this behavior? I would appreciate any guidance on why this hook is not being called on some sites.

Thank you.

if (isset($enable[0]) && $enable[0] == 1) {
 add_filter( 'generate_post_author_output', [$this,'ai_post_render_author'] );
}

        function ai_post_render_author() 
        {
            global $post;

            $author = esc_html(get_the_author());
            $author_archive = esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) );
            $author_image = get_avatar( get_the_author_meta( 'ID' ), 25 );
            
            $author_tooltip = '';
            $editor_row = '';

                $author_image = '<img alt="" src="'. get_site_icon_url() . '" srcset="'. get_site_icon_url() . ' 2x" class="avatar avatar-25 photo" height="25" width="25" decoding="async">';

                $author_tooltip = '...';
    
                $editor_id      = get_post_meta($post->ID, '...', '');
                $editor_archive = esc_url( get_author_posts_url( $editor_id[0] ) );
                $editor_params  = get_user_by( 'ID', $editor_id[0] );
                $editor_image   = get_avatar( $editor_id[0], 25 );
                $editor         = $editor_params->display_name;
                $editor_tooltip = '...';

                $editor_row     = ' ...';
            }

            $entry_meta  = '<div class=""><span class="byline">';
            $entry_meta .= '<span class="author vcard" itemtype="https://schema.org/Person" itemscope="itemscope" itemprop="author">Scritto da <span class="tooltip"><a class="url fn n" title="Vedi tutti i post di ' . $author . '" rel="author" itemprop="url" href="' . $author_archive . '"><span class="author-name" itemprop="name">' . $author . '</span></a>' . $author_tooltip . '</span></span>';
            $entry_meta .= $editor_row;
            $entry_meta .= '</span></div>';   
           
            return $entry_meta;
        }

nothing, I’ve just tried without conditions, it’s like doesn’t exists the hook

Yes, I have tried that. I also installed Query Monitor, and it appears that the hook is not being called. This remains a significant mystery.

I’m conducting a more detailed debug. I’ve noticed that on sites where it works, disabling Yoast also causes it to stop working. At this point, I suspect the issue is with Yoast.

What’s odd is that disabling Yoast also prevents generate_post_author_output from functioning. Have you ever encountered this issue?

The most curious thing is that if I disable Yoast, the hook stops working. I’ll keep looking into it. Thanks for the help.