There is a known defect that has been logged for this issue. I would like to attach your situation to the defect as well. Please forward your dataset, gpk and dgn, to me. You can attach it here under the Advanced Reply editor or post it on our ftp site.
ftp.bentley.com/.../incoming
Thanks
communities.bentley.com/.../27341.openroads-training
ftp.bentley.com/.../incoming
Thanks
communities.bentley.com/.../27341.openroads-training