Two-way data binding is not working for create a record

in my Xamarin.Forms project I’m using two-way data binding, so I bind an entry component directly to the View Model property (which is the RealmObject). In the view which I’ve evolved from “custom” logic to two-way data binding, it works as expected (I’ve created an empty record in the db) but in the new view which was written directly with two-way data binding the record is not stored in the database.
What am I missing?

public class SettingsViewModel : ObservableObject
    public Settings WorkingHoursSettings { get; set; }

    public SettingsViewModel(IRealmConnector realmConnector)
        var realm = realmConnector.OpenRealm();

        WorkingHoursSettings = realm.ReadWorkingHours();

public class Settings : RealmObject
    public static string WORKING_HOURS_KEY = "working-hours";

    public ObjectId Id { get; set; }

    public string Key { get; set; }

    public string Value { get; set; }

public static class RealmExtensions
    public static Entities.Settings ReadWorkingHours(this Realm instance) =>
        instance.All<Entities.Settings>().FirstOrDefault(f => f.Key == Entities.Settings.WORKING_HOURS_KEY);

    Placeholder="How long is your shift in hours"
    Text="{Binding Path=WorkingHoursSettings.Value}"

Hi @Sebastian_Busek could you show us more code? Generally the more a user shows, the easier it is for us to help him/her.
I’m particularly interested in the view, but show us more if you can. If the code has sensitive data, I can supply you with a link to securely upload the code.