Xamarin.Auth - Google OAuth don't close over UWP when IsUsingNativeUI is set to true

Hi,

I just implemented Xamarin.Auth on UWP, and I have a weird problem.
I begin by creating my OAuth object :

    public OAuth()
    {
        account = null;
        store = null;

        Scope = "";
        AuthorizeUrl = "";
        AccessTokenUrl = "";
        UserInfoUrl = "";

        clientId = "";
        clientSecret = null;
        redirectUri = "";
    }

    public OAuth Facebook()
    {
        // These values do not need changing
        Scope = "email";
        AuthorizeUrl = "https://www.facebook.com/v2.8/dialog/oauth";
        AccessTokenUrl = "https://graph.facebook.com/oauth/access_token";
        UserInfoUrl = "https://graph.facebook.com/me?fields=email,name,gender,picture";

        clientId = "xxxx";
        clientSecret = "xxxxx";
        redirectUri = "http://www.facebook.com/connect/login_success.html";

        isUsingNativeUI = false;

        OAuthParser = ParseFacebookResponse;

        return this;
    }

    public OAuth GooglePlus()
    {
        // These values do not need changing
        Scope = "https://www.googleapis.com/auth/userinfo.email";
        AuthorizeUrl = "https://accounts.google.com/o/oauth2/auth";
        AccessTokenUrl = "https://www.googleapis.com/oauth2/v4/token";
        UserInfoUrl = "https://www.googleapis.com/oauth2/v2/userinfo";

        clientId = "xxxxx";
        redirectUri = "xxxxxx";

        isUsingNativeUI = true;

        OAuthParser = ParseGooglePlusResponse;

        return this;
    }

On Android, either if isUsingNativeUI is set to true or false, after I connect myself, the webview/oauth get closed. Over UWP however, it doesn't work when isUsingNativeUI is set to true, the webview/oauth don't close, so I'm navigating on google and I am not able to come back on the app (UWP Desktop)...

Do you have any idea? Thank for any help !