$emitter.subscribe for event inside init() not working

I have a JS plugin in Shopware 6, that subscribes to two events of another JS plugin:

One that fires after the user interacts with the page and one that fires at the end of init().

The latter does nothing. I am confused, because the other event works just fine.

Both $emitter.publish have the same argument. In my plugin, they use the same method:

// main.js
import MyPlugin from "./my-plugin/my-plugin.plugin";

const PluginManager = window.PluginManager;
PluginManager.register("MyPlugin", MyPlugin);

// ./my-plugin/my-plugin.plugin.js
import Iterator from "src/helper/iterator.helper";

export default class MyPlugin extends window.PluginBaseClass {
  init() {
    const configuratorPlugins =
      window.PluginManager.getPluginInstances("TargetPlugin");
    Iterator.iterate(configuratorPlugins, (instance) => {
      // nope ...
      instance.$emitter.subscribe("init", this.onEvent.bind(this));
      // working ...
      instance.$emitter.subscribe(
        "otherEvent",
        this.onEvent.bind(this)
      );
    });
  }

  onEvent(event) {
    // do it ...
  }
}

// target-plugin.plugin.js
    init() {
        // ...
        this.$emitter.publish('init', this.createCurrentState());
    }

The init event is not inside an if statement. I tested this.createCurrentState() with a console.log() right before the event and that works.

Also, I looked into PluginManager.getPluginList(). The other plugin is in the list before my plugin gets registered – if that helps.

Don’t know what I am doing wrong. That plugin is the only one which publishes an event inside init().