No subscribers registered for event class error - Greenrobot

Question

I am getting this warning and the code written in my event subscriber is not triggered always.. it is very random.

Can someone help me with this. Thanks.

I have this class which posts the event...
EventListAdapter:

protected void updateDbToHandle(Context context, Cursor cursor) {
  //something here....
  toggleEvent.setContext(context);
  EventBus.getDefault().post(toggleEvent);
}

protected void updateDbToIgnore(Context context, Cursor cursor) {
  //something here....
  toggleEvent.setContext(context);
  EventBus.getDefault().post(toggleEvent);
}

Event class:

public class ToggleEvent {
  private String name;
  private Context context;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Context getContext() {
    return context;
  }

  public void setContext(Context context) {
    this.context = context;
  }
}

and the subscriber:

public class ToggleEventListener {

  public ToggleEventListener() {
    super();
    EventBus.getDefault().register(this);
  }

  public void onEvent(ToggleEvent toggleEvent) {
    Log.d("toggleEvent", "toggle event triggered in event bus");
    Context context = toggleEvent.getContext();
    Intent intentForRinger = new Intent(context, RingerToggler.class);
    System.out.println("change in calendar is here ");
    //calRead.getEventControl(context);
    intentForRinger.putExtra("START_TIME", false);
    intentForRinger.putExtra("RESCAN", false);
    intentForRinger.putExtra("CHANGE", true);
    intentForRinger.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startService(intentForRinger);
    EventBus.getDefault().unregister(this);
  }
}

Not sure why I get this warning...
and also my code written inside the toggle event is not executed everytime..
it is getting missed and it is very random that the event is invoked...