A URL load a wrong page while in the backend the page is correct

Ok, it means that the snippet needs one more adjustment – please use this version instead:

function pm_ignore_filter_endpoint( $uri_parts, $request_url, $endpoints ) {
	if ( ! empty( $uri_parts['endpoint'] ) && $uri_parts['endpoint'] == 'filter' ) {
		$uri_parts['uri'] .= "/filter";
		$uri_parts['endpoint'] = "";
	}

	return $uri_parts;
}
add_filter( 'permalink_manager_detect_uri', 'pm_ignore_filter_endpoint', 100, 3 );

Now https://ronb33.sg-host.com/de/schweisrauchabsaugung/filter/sfc/ opens https://ronb33.sg-host.com/de/schweisrauchabsaugung/filter/

And the same with all the other products.

• This reply was modified 1 week, 2 days ago by ericafontimedia.

I see – the best idea here would be instead to simply remove the /filter/ endpoint from the list of endpoints supported by Permalink Manager:

function pm_exclude_filter_endpoint( $endpoints ) {
	return preg_replace('/(\||^)(filter)(\||$)/', '$3', $endpoints );
}
add_filter( 'permalink_manager_endpoints', 'pm_exclude_filter_endpoint', 100 );

It works!

Thank you for your support!! ??