No way (pagination, slicing) to get more than 500 results [OpenLDAP 2.4]

Environment:

LDAP Server Type: OpenLDAP 2.4
PHP Version: 8.3.7

Describe the bug:

In a specific OU on our server, we have more than 500 entries (565 as of today), but there's no way, using the documented methods (or I'm using them wrong), to get all the records, via get() or paginate(). As you can see below, I've found a way to circumvent the limit (by hacking around a loop with a crazy filter), but there's something either broken, or that I don't understand properly.

Could it be a limitation by the server?

<?php

include("./vendor/autoload.php");

use LdapRecord\Container;
use LdapRecord\Connection;

$connectionSettings = [
  "hosts" => ["host.example.com"],
  "port" => 636,
  "base_dn" => "ou=org,dc=example,dc=com",
  "use_ssl" => true,
  "username" => "xxxx",
  "password" => "xxxx",
  "timeout" => 3,
];

$connection = new Connection($connectionSettings);
Container::addConnection($connection);

$clients = $connection->query()
                       ->in('ou=clients,ou=externals,ou=org,dc=liip,dc=ch')
                       ->where('objectClass','=','inetorgperson')
                       ->orderBy('cn');

$clients_ = clone $clients;
// First, let's prove we have more than 500 clients
// The trick is to run the request to the max allowed (get()), get the list of cns and massage it as filter for the next round.
$results = []; 
$filters = [];
do {
    $hadSomeThisTurn = false;
    foreach ($clients_->rawFilter($filters)->get() as $entry) {
        $results[$entry['cn'][0]] = $entry;
        $hadSomeThisTurn = true;
    }
    $filters = ["(!(|(cn=".implode(")(cn=", array_keys($results)).")))"];
} while($hadSomeThisTurn);

// Says 565 (in our case)
dump("fakePaginator", count($results));

// Says "500"
$clients_ = clone $clients;
dump("get()", count($clients_->get()));

assert(!$clients_->isPaginated());

// Says "500" too
$clients_ = clone $clients;
dump("paginate()", count($clients_->paginate()));

// Says "500" too
$clients_ = clone $clients;
dump("paginate(600)", count($clients_->paginate(600)));

// Says "500" too
$clients_ = clone $clients;
dump("paginate(50)", count($clients_->paginate(50)));

assert($clients_->isPaginated());

$clients_ = clone $clients;
$results = [];
$page = 1;
$perPage = 100;
do {
    $slice = $clients_->slice($page, $perPage);
    foreach ($slice->items() as $entry) {
        $results[] = $entry;
    }
    $page++;
} while($slice->hasMorePages()) ;

// Slicing doesn't work, there are 2 pages only
dump("pages", $page);
// Says "500" too
dump("slices", count($results));

DirectoryTree / LdapRecord

No way (pagination, slicing) to get more than 500 results [OpenLDAP 2.4] #724