AsyncNotifier not rebuilding when watching a Notifier whose state changes

[jacktattersall1]

Hi.
I'm struggling to chain notifiers together, and can;t quite tell from the docs why this isn't working.

Feels like a simple use case (though i could be wrong).

@Riverpod(keepAlive: true)
class AmendDeliveryController extends _$AmendDeliveryController {
  @override
  FutureOr<AmendDelivery> build() async {
    final round = await ref.watch(roundStreamProvider.future);

    ref.watch(searchTermProvider);
    log("NOT FIRING WHEN SEARCH TERM UPDATED");
    
    return AmendDelivery();
  }
}


@Riverpod(keepAlive: true)
class SearchTerm extends _$SearchTerm {
  @override
  String build() {
    return '';
  }

  void updateSearchTerm(String searchTerm) {
    log("FIRING WHEN I CALL THIS");
    state = searchTerm;
  }
}

Any help greatly appreciated :)