Rtp command error

public function onExecute(CommandSender $sender, string $commandLabel, array $args) : bool
{
/** @var Player $sender */
$world = $sender->getWorld();

    $x = random_int(-800, 800);
    $z = random_int(-800, 800);
    
    $world->loadChunk($x >> 4, $z >> 4);
    
    $y =  $world->getHighestBlockAt($x, $z) + 1;
    
    $sender->teleport(new Vector3($x, $y, $z));

    return true;
}

[Server thread/CRITICAL]: pocketmine\world\WorldException: “Cannot get highest block in an ungenerated chunk” (EXCEPTION) in “pmsrc/src/world/World” at line 2814

Нельзя получить блок в ещё не сгенерированом чанке