Looping potfolio

the other question is : how to loop only in the same category …
use search function with : “same_category”

Allthough i did not update to WP 5.6 there is one customer installation that does not loop on same category with known snippets:
neither:

add_filter('avf_post_nav_settings','enfold_customization_postnav', 10, 1);
function enfold_customization_postnav($settings){
  $settings['same_category'] = true;
  $settings['is_fullwidth'] = false;
  if( 'post' == $settings['type'] )  { $settings['skip_output'] = false;}
  if( 'portfolio' == $settings['type'] )  { $settings['skip_output'] = false;}
  return $settings;
}

nor:

function my_avf_post_nav_settings( array $settings ){
  if( true === $settings['is_hierarchical'] ){
    $settings['skip_output'] = true;
    return $settings;
  } 
  if( ! in_array( $settings['type'], array( 'post', 'portfolio' ) ) ){
    $settings['skip_output'] = false;
    return $settings;
  }
  $settings['same_category'] = true;
  $settings['is_fullwidth'] = false;
  $settings['skip_output'] = false; 
  return $settings;
}
add_filter( 'avf_post_nav_settings', 'my_avf_post_nav_settings', 10, 1 );

is working. ?

Edit : Sorry now i know why. I installed a Custom Post Order Plugin – and that messed up the loop.