Pics not showing on archive page

Hi,
The following tickets was closed yestrday as solved https://kriesi.at/support/topic/category-boxes-with-images-bottom-of-post/

Only now, I noticed that something strange happens. The post features pictures we set to appear on archive page with this PHP code

/* Show featured picture in the archive page */
function custom_image_script(){
  ?>
  <script>
(function($){
  $(window).load(function(){
  $( '#top.archive #wrap_all #main .post-entry' ).each(function() {
  $( this ).find( '.avia-image-container' ).insertBefore( $(this).find('.entry-content'));
  });
  });
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'custom_image_script');

are showing correctly. But only some of them, not all. See the examples in 2 different archive page:
– https://www.ninserviziogratuito.co.uk/categoria/lavoro >>>>>> https://www.screencast.com/t/SfA0JUf9N
– https://www.ninserviziogratuito.co.uk/categoria/soldi >>>>>> https://www.screencast.com/t/7gYkhhhoko

All pics are set in the same way, so I cannot understand why those in particular are not showing up.

Thanks,
Marco