Checking if target and killer are instanceof Player not working

There's a bug with both PlayerDeathEvent and EntityDeathEvent. When one entity kills another and I check if both are instanceof player, the code does not execute but without checking it does.

Here's my code:

PHP:

   /**
    * @param EntityDeathEvent|PlayerDeathEvent $event
    */
    public function onDeath(EntityDeathEvent $event){
            $target = $event->getEntity();
            $cause = $event->getEntity()->getLastDamageCause();

            if($cause instanceof EntityDamageEvent){
                    if($target instanceof Player){
                            $this->core->PocketLegionLevels()->setDeaths($target, $this->core->PocketLegionLevels()->getDeaths($target) + 1);
                    }
            }

            if($cause instanceof EntityDamageByEntityEvent){
                    $killer = $cause->getDamager();

                    if($killer instanceof Player and $target instanceof Player){
                            $this->core->PocketLegionLevels()->setKills($killer, $this->core->PocketLegionLevels()->getKills($killer) + 1);
                            $this->core->PocketLegionLevels()->setDeaths($target, $this->core->PocketLegionLevels()->getDeaths($target) + 1);

                            if($this->core->PocketLegionLevels()->getCrate($killer)){
                                    $level = $this->core->PocketLegionLevels()->getLevel($killer);
                                    Server::getInstance()->broadcastMessage(RandomUtils::colorMessage(str_replace(['@player', '@level'], [$killer->getName(), $level],
                                        $this->core->getMessage('levels', 'receive_crate'))));
                            }

                            if($this->core->PocketLegionLevels()->playerLevelUp($killer)){
                                    $level = $this->core->PocketLegionLevels()->getLevel($killer);
                                    Server::getInstance()->broadcastMessage(RandomUtils::colorMessage(str_replace(['@player', '@level'], [$killer->getName(), $level],
                                        $this->core->getMessage('levels', 'level_up'))));
                            }
                    }

                    return;
            }
    }


 

Have you tried var_dump to see what $killer and $target are?

 

What else could they be besides Players? I already tested it by killing another Player and it isn't doing anything.

 

If everything you stated is true, then a check isn't passing somewhere. There is absolutely 0 harm in debugging every variable.

 

Ok, sure. I'll try it but I don't have another player to test it. Is there a way I can spawn a testing NPC?

 

You did use pocketmine/Player right?

 

Would anyone test this with me or how can I spawn an NPC?

 

I forgot about that one. Does it still work for api 3.0.0-ALPHA4?