React Native unmount scene listening to event

Question

I am working on mobile app with React Native and have discovered this weird behaviour using EventEmitter in my project. I am using Flux. In my Scene (Component) I listen to Event as seen below in code:

Component:

componentWillMount(){
  BasketStore.addChangeListener(this._onChange.bind(this));
}

componentWillUnmount(){
  BasketStore.removeChangeListener(this._onChange.bind(this));
}

BaseStore:

export default class BaseStore extends EventEmitter {
  constructor() {
    super();
  }

  emitChange() {
    this.emit(CHANGE_EVENT);
  }

  addChangeListener(callback) {
    this.on(CHANGE_EVENT, callback);
  }

  removeChangeListener(callback) {
    this.removeListener(CHANGE_EVENT, callback);
  }

  subscribe(actionSubscribe) {
    this._dispatchToken = AppDispatcher.register(actionSubscribe());
  }

  get dispatchToken() {
    return this._dispatchToken;
  }
}

BaskekStore:

class BasketStore extends BaseStore {...}

In Navigator I do navigator.pop() to go back in my route. From documentation it says that it should unmount my Component every time I do pop, which I use to go back in my previous scene. However it does not, and my Component still listens to _onChange event which make app behave wrong, the more I swap between views app becomes slow and eventually crush as there are too many views and listeners.

Thanks in advance!