所以我在Akka中使用了不同的行为。当我执行这段代码时：

@Override
public Receive<CommonCommand> createReceive() {
    return notYetStarted();
}

public Receive<CommonCommand> notYetStarted() {
    return newReceiveBuilder()

            .onMessage(RaceLengthCommand.class, message -> {

                // business logic

                return running();
            })

            .build();
}

public Receive<CommonCommand> running() {
    return newReceiveBuilder()

            .onMessage(AskPosition.class, message -> {

                if ("some_condition") {

                    // business logic

                    return this;

                } else {

                    // business logic

                    return completed(completedTime);
                }

            })

            .build();

}

public Receive<CommonCommand> completed(long completedTime) {
    return newReceiveBuilder()

            .onMessage(AskPosition.class, message -> {

                // business logic

                return this;
            })

            .build();

}

我得到了以下日志：

21:46:41.038 [monitor-akka.actor.default-dispatcher-6] INFO akka.actor.LocalActorRef - Message [learn.tutorial._5_racing_game_akka.RacerBehavior$AskPosition] to Actor[akka://monitor/user/racer_1#-1301834398] was unhandled. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

最初，RaceLengthCommand消息被发送到notYetStarted()行为。这工作正常。然后，这个行为应该转换到running()行为，第二个行为应该接收消息AskPosition。
但是根据我的测试，AskPosition消息被传递给notYetStarted()行为，这与我对这个概念的整体理解相矛盾。
我通过从running()行为中复制onMessage()部分并粘贴到notYetStarted()行为中来确认这一点。
很显然，即使在我切换了行为之后，notYetStarted()行为也确实在接收消息？为什么会发生这种情况？？