Lightbox and background scroll

What has changed in Enfold 5?
on previous versions of Enfold I think it was that when the lightbox was open it was fixed, and only the body could still scroll.
This is not the best behavior, a fixed body with the lightbox open would be best.
But now we have scrolling for the lightbox container as well? Is there a reason for this?
Open an image and scroll with your mouse:
https://kriesi.at/themes/enfold-parallax/#portfolio
PS:
Looking at the old Enfold demos, I guess my assertion is not true. But wouldn’t that be a desirable behavior of the lightbox?

yes i can put this to child-theme functions.php to have that:

function custom_lightbox_script(){
?>
<script type="text/javascript">
(function($) {
    function a() {
      $('body').on('click', '.lightbox-added', function() {
        if($('.mfp-bg').length >= 1) {
          $('html').css("overflow-y", "hidden");
        } 
      });
      
      $('body').on('click', function() {
        setTimeout( function() {
          if($('.mfp-bg').length == 0) { 
            $('html').css("overflow-y", "scroll");
          }
        },500);   
      });
    }
  a(); 
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'custom_lightbox_script');

but i think some settings on the lightbox options will be more performant
fixedBgPos true/false
overflowY auto / scroll / hidden