Oculus.Platform.Parties.GetCurrent() returns invalid json

Hiya, I am trying to check if the user is currently in a “Party” ie a group call through the People app. I think I should be able to use Parties.GetCurrent, but I get error messages like

DeserializeObjectInner Party failure: Root field current_party not object: {“id”:“6609608349982347”}

Does anyone have an idea how to get around this?

Thanks, Bas