Why doesn't Provider trigger both my ProxyProviders?

I'm using the Provider library in Flutter, and I've got a ChangeNotifier which notifies its listeners when the application state changes.

I have two ProxyProviders which should update their dependent objects when that happens. Except only the first one executes. The second never does.

Widget providerSetup({required Widget child}) {
  return MultiProvider(
    providers: [
      ChangeNotifierProvider<AppStateNotifier>.value(value: AppState.notifier),
      ProxyProvider<AppStateNotifier, AppState>(
        create: (context) => AppState.state,
        update: (context, n, child) => n.value, // this executes
      ),
      ProxyProvider<AppStateNotifier, RecipeCustomization?>(
        create: (context) => AppState.state.custom,
        update: (context, n, child) => n.value.custom, // this does not
      ),
    ],
    child: child,
  );
}

How can I fix this?

Because each Each ProxyProvider gives you the previous value of its dependency, it won't change the state when you listen to AppStateNotifier twice.

ProxyProvider<AppStateNotifier, AppState>(
  update: (context, n, child) => n.value,
),
ProxyProvider<AppState, RecipeCustomization?>(
  update: (context, state, child) => state.custom,
),