IdpSsoResult null after successfully calling ReceiveSsoAsync

I can successfully send and receive SSO without any major problems.
However, I am trying to record the partner name after receiving SSO and the IdPSsoResult object is empty/null (see attached image).
https://www.componentspace.com/Forums/Uploads/Images/1d0dfb20-4c9e-4e48-ae3b-3f15.png

Line of code in question: var result = await _samlIdentityProvider.ReceiveSsoAsync();

After calling ReceiveSsoAsync the saml identity provider fills out all relevant information, such as PartnerProviderConfiguration, but the result is empty.
Is this a bug?

Thanks!

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