Observer not working when passing ObservableList to child widget #731

Hello,

recently we have discovered a bug where events were not showing on calendar date change. This bug was caused by the fact that reactivity were not triggered on filteredDates ObservableList change because it was passed down to child widget. However when I have added observable list usage at top level it started to acct as expected.

Not triggered

Observer(builder: (_) {
        return EventsDisplay(_store.filteredEvent);
      }),

Triggered:

Observer(builder: (_) {
        return _store.filteredEvent.isEmpty ? Container() : EventsDisplay(_store.filteredEvent);
      }),

Any ideas why?