[FloatingTextParticle] setInvisible doesn't work ???

Hello,
I try to make invisible the FloatingTextParticles when a player changes his world but it does not work....

The Main :

PHP:

public $holos = array();

public function TaskText($joueur){
   $particle1 = new FloatingTextParticle(new Vector3(103, 13, 129), "message", "title");
   $this->holos[$joueur->getName()] = $particle1;

   $this->getServer()->getDefaultLevel()->addParticle($particle1);
}
public function onPlayerPreLogin(PlayerPreLoginEvent $event){
   $player = $event->getPlayer();

   $this->getServer()->getScheduler()->scheduleRepeatingTask(new TaskText($this, $player), 200);
}

public function onLevelChange(EntityLevelChangeEvent $event){
   $player = $event->getEntity();
   $particle1 = $this->holos[$player->getName()];

   if($player instanceof Player){
     $world = $event->getTarget()->getName();
     if(!$world == "world"){
       $particle1->setInvisible(true);
       $this->getServer()->getDefaultLevel()->addParticle($particle1);
     }else{
       $particle1->setInvisible(false);
       $this->getServer()->getDefaultLevel()->addParticle($particle1);
     }
   }
}

The Task :

PHP:

  public function __construct(Main $owner, Player $player){
    parent::__construct($owner);
    $this->owner = $owner;
    $this->player = $player;
  }

  public function onRun($currentTick){
    $this->owner->TaskText($this->player);
  }

After every change of the particle you need to respawn it

What do you mean by that ?

I do that but it does not change anything... Look :

PHP:

$particle1->setInvisible(true);
$this->getServer()->getDefaultLevel()->addParticle($particle1);

nobody ?