Get DialogPage settings from a ILanguageClient

Question

I am trying to create an extension for visual studio with AsyncPackage and ILanguageClient. I have created a DialogPage named Config. When I launch my extension the page "Config" does exist but impossible to get its values from the OnLoadedAsync I always obtain the default values. But if I go directly to the settings InitializeAsync is called and I got the correct values from 'Config'.

public class LanguageClient : AsyncPackage, ILanguageClient
    {

        public async Task<Connection> ActivateAsync(CancellationToken token)
        {
           ...
        }

        public async Task OnLoadedAsync()
        {

            Config page = (Config)GetDialogPage(typeof(Config));//Default values....
            
            _path = page.OptionPath;
            if (_path != null && _path != "")
            {
                await StartAsync.InvokeAsync(this, EventArgs.Empty);
            }
        }

        protected override async Task InitializeAsync(CancellationToken cancellationToken, IProgress<ServiceProgressData> progress)
        {
.
            Config page = (Config)GetDialogPage(typeof(Config)); //Good Values

            await this.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
        }