arafail

Thank you for the answer.
We will try Ad Inserter.

Hello and sorry for the delayed response. This has become less important at the moment.
We will come back to this in the future. Thanks!

Hello!
Apologies for the late response.
We have managed to track down the culprit and fix the CLS issue, and I am happy to report it had nothing to do with the AMP plugin.
There was an issue with the site header, which loaded 0.3s later than the body and had no fixed height. The entire issue lasted so little that the human eye did not see it, however, google did.
Thank you very much for your support!

Hello!
Did you get a chance to look at this further?

The issue I am struggling with is CLS (Cumulative Layout Shift).
More to the point, regarding this ad blocks, the problems seems to be that they are served with a different size than they should. The hardcoded size is 300×250 and as you can see (it is also visible in your video), that size gets changed. I have narrowed it down to the AMP plugin as I have disabled it on a test environment and the code did not change anymore.

Thanks!

Thank you!

I am sorry for not responding.
It is indeed ok.
We just encountered many other issues with the project.

Thanks for reply @howdy_mcgee
1: I did not use the Health check, However I did disable all plugins and the issue was still there. The Custom taxonomy is included via my theme, and it did work until some point. Also, there is another identical custom taxonomy, which I included at the same time that still works.
2: There is no error in the error log.
3: Please see the code below

<?php 
// Register Custom Taxonomy
function custom_sponsors() {

	$labels = array(
		'name'                       => _x( 'Sponsors', 'Taxonomy General Name', 'text_domain' ),
		'singular_name'              => _x( 'Sponsor', 'Taxonomy Singular Name', 'text_domain' ),
		'menu_name'                  => __( 'Sponsors', 'text_domain' ),
		'all_items'                  => __( 'All Sponsors', 'text_domain' ),
		'parent_item'                => __( 'Parent', 'text_domain' ),
		'parent_item_colon'          => __( 'Item:', 'text_domain' ),
		'new_item_name'              => __( 'New Sponsor', 'text_domain' ),
		'add_new_item'               => __( 'Add New Sponsor', 'text_domain' ),
		'edit_item'                  => __( 'Edit Sponsor', 'text_domain' ),
		'update_item'                => __( 'Update Sponsor', 'text_domain' ),
		'separate_items_with_commas' => __( 'Sepprate by comma', 'text_domain' ),
		'search_items'               => __( 'Search', 'text_domain' ),
		'add_or_remove_items'        => __( 'Add or delete', 'text_domain' ),
		'choose_from_most_used'      => __( 'Add most used', 'text_domain' ),
		'not_found'                  => __( 'Not Found', 'text_domain' ),
	);
	$rewrite = array(
		'slug'                       => 'sponsor',
		'with_front'                 => true,
		'hierarchical'               => true,
	);
	$args = array(
		'labels'                     => $labels,
		'hierarchical'               => true,
		'public'                     => true,
		'show_ui'                    => true,
		'show_in_rest' 				 => true,
		'show_admin_column'          => true,
		'show_in_nav_menus'          => true,
		'show_tagcloud'              => true,
		'query_var'                  => 'sponsor',
		'rewrite'                    => $rewrite,
	);
	register_taxonomy( 'sponsor', array( 'post' ), $args );

}

// Hook into the 'init' action
add_action( 'init', 'custom_sponsors', 0 );

?>