How to exclude current posts from related posts grid

Try this snippet in your child-theme functions.php:

function ava_exclude_current_post($query) {
  if (is_singular('post') || is_singular('portfolio') ) {  
    $exclude = avia_get_the_ID();
    $query->set( 'post__not_in', array($exclude) );
  }
}
add_action('pre_get_posts', 'ava_exclude_current_post');

// in the if-clause you can use aswell  :   if(is_single()){
 

i guess not – maybe the custom-post type had to be first included to ALB support:

Replace the “event” with the name of your CPT:

function avf_alb_supported_post_types_mod( array $supported_post_types ) {
  $supported_post_types[] = 'event';
  return $supported_post_types;
}
add_filter('avf_alb_supported_post_types', 'avf_alb_supported_post_types_mod', 10, 1);

function avf_metabox_layout_post_types_mod( array $supported_post_types ) {
  $supported_post_types[] = 'event';
  return $supported_post_types;
}
add_filter('avf_metabox_layout_post_types', 'avf_metabox_layout_post_types_mod', 10, 1);

no – but if you go further to f.e. “Rail across Canada” that Post is still on the slider.
So try to include your CPT ( guess it is: escorted-vacations) to the alb handling

or Mike …. maybe it is first needed to include the CPT to search – as you have done it here: https://kriesi.at/support/topic/seiten-aus-der-enfold-suche-ausschliesen/#post-1396760