JMSSerializer事件不适用于具体类型

我正在尝试创建一个 EventSubscriber 对于不同的序列化事件,使用 Symfony 3.4.21 , JMSSerializer 2.1.0 和 JMSSerializerBundle 3.0.0 .

问题是,订阅服务器只有在没有为具体类型注册时才工作。 为什么会这样?

我的设置:

// src/AppBundle\EventListener\SerializationEventSubscriber.php
use JMS\Serializer\EventDispatcher\Events;
use JMS\Serializer\EventDispatcher\EventSubscriberInterface;
use JMS\Serializer\EventDispatcher\PreSerializeEvent;
use JMS\Serializer\EventDispatcher\ObjectEvent;

class SerializationEventSubscriber implements EventSubscriberInterface {
    public static function getSubscribedEvents() {        
        return array(       
            // Subscribe with NO specific class       
            array('event' => Events::PRE_SERIALIZE, 'method' => 'onPreSerialize_NoClass'),
            array('event' => Events::POST_DESERIALIZE, 'method' => 'onPostDeserialize_NoClass'),


            // Subscribe WITH specific class       
            array('event' => Events::PRE_SERIALIZE, 'method' => 'onPreSerialize_Class', 'class' => 'AppBundle\Entity\MyEntity'),
            array('event' => Events::POST_DESERIALIZE, 'method' => 'onPostDeserialize_Class', 'class' => 'AppBundle\Entity\MyEntity'),
        );
    }

    public function onPreSerialize_NoClass(PreSerializeEvent $event) {
        // log...
    }

    public function onPostDeserialize_NoClass(PreSerializeEvent $event) {
        // log...
    }

    public function onPreSerialize_Class(PreSerializeEvent $event) {
        // log...
    }

    public function onPreSerialize_Class(PreSerializeEvent $event) {
        // log...
    }
}


// app/config/services.yml
AppBundle\EventListener\SerializationEventSubscriber:
    tags:
        - { name: "jms_serializer.event_subscriber" }  

虽然正确调用了前两个处理程序(定义时没有特定的类),但具有特定类的两个处理程序是 不叫 .

如果我检查事件对象的类 ..._NoClass 处理程序,它与 ..._Class 处理程序。

根据 docs 为一个特定的类定义一个处理程序应该没有问题。 我的配置有什么问题?