Lastest Blog H1 when Translated

Interesting occurrence with custom filter you’ve provided me on my Spanish site. The filter is to replace the Latest Blog header for posts with the post title. Code you’ve provided:

add_filter(‘avf_title_args’, ‘fix_single_post_title’, 10, 2);
function fix_single_post_title($args,$id)
{
if ( is_singular(‘post’) )
{
$args[‘title’] = get_the_title($id);
$args[‘link’] = get_permalink($id);
$args[‘heading’] = ‘h1’;
}

return $args;
}

Issue:
The code only sometimes works! Some category posts have the title displaying while another category has the Enfold static header. Why?
Please see example URLs in private.