Since I update to IOS 11.03 in my Iphone 6, I can't save properties with Xamarin.Forms.Application.Current.SavePropertiesAsync(), I use this metod in DidEnterBackground event in IOS Project and in OnSleep() event in PCL Project. Any idea??

    protected override async void OnSleep()
    {
        await Current.SavePropertiesAsync();
        base.OnSleep();
    }


    public override async void DidEnterBackground(UIApplication application)
    {
        Messaging.SharedInstance.Disconnect();
        await Xamarin.Forms.Application.Current.SavePropertiesAsync();
        Console.WriteLine("Disconnected from FCM");
    }