Only first login works, when launching app again, it doesnt

[calgara12]

I have a WPF .NET 4.8 app that needs to be switched to OIDC.

I have looked at the Samples, and managed to get the login working, however it only works on the first login, when I close my app and start it again, my browser gets launched, but i will not get redirected to my app. If I manually delete the cookies from my identity provider, then after I launch my app, it works again.
What could be causing this?

_options = new OidcClientOptions()
{
    Authority = "https://identityprovider.test.com",
    ClientId = "myApp",
    Scope = "openid profile email edit address",
    RedirectUri = "myapp://callback",
};
_client = new OidcClient(_options);


_state = await _client.PrepareLoginAsync();

// open system browser to start authentication
OpenBrowser(_state.StartUrl);

// Wait for the user to login
var result = await ReceiveSignInCallback(); // this is where it hangs once I launch my app again after a short time, clearing my cookies fixes it
RestAPI.InitializeClient(result.AccessToken;);

Also when my browser is launched the user does not need to enter credentials, he is verified by our authority provider through his windows credentials.

Thank you in advance