Attribute issue

Hey, since no one answered the previous thread I posted, here we go again with a furthermore issue with PocketMine-MP's attribute.

After respawn, no matter what the heck you do, it won't set the attribute unless you restart your server.
What could be the problem?

 

Could you show your code?

 

PHP:

public function onToggle(PlayerToggleSneakEvent $event) {
        $player = $event->getPlayer();
        $name = $player->getName();
        $value = $this->plugin->speed->get($name);
        $attr = $player->getAttributeMap()->getAttribute(Attribute::MOVEMENT_SPEED);
        $attr->setValue($value);
        $player->sendMessage("Toggled sneak!"); // return message to check if the code is working
    }

The code does return message, but the "setValue".

Attribute doesn't want to work after respawn. I'll have to manually restart the server and rejoin to make it work