Why LiveData still notify Activity which is in onPause state?

I have the following code in Activity

@Override
public void onPause() {
    super.onPause();

    if (isFinishing()) {
        final LiveData<StickyNoteConfig> stickyNoteConfigLiveData = StickyNoteConfigRepository.INSTANCE.getStickyNoteConfig(mAppWidgetId);
        stickyNoteConfigLiveData.removeObservers(this);
        stickyNoteConfigLiveData.observe(this, stickyNoteConfig -> {
            // Weird, I still can receive call back.
            // I thought "this" is no longer active?
        });
    }
}

I feel puzzled that, Observer is still being triggered, although this activity is already in onPause state? According to https://developer.android.com/reference/android/arch/lifecycle/Lifecycle.State#STARTED

Started state for a LifecycleOwner. For an Activity, this state is reached in two cases:

after onStart call;
right before onPause call.

May I know why it is so?

from Why LiveData still notify Activity which is in onPause state?