We deprecated and then removed the lightweight versioning support that existed in earlier versions of Stardog. So the behavior you are seeing is expected; we do not support
As Zach said, we are currently considering different, but similar functionality, around temporal or bi-temporal access to the data physically held in Stardog. There are a lot of open questions around what are the precise features required for this and how it interacts with virtual graphs.
We'd love to hear about your use case to help inform the feature design process.