Insert Conjoint block with reference survey

Hello,
I have a survey, in which I want to add a conjoint block (from DesignXM toolbox) using the new "insert reference survey (from library)" tool.
However, I am not able to upload an entire survey with a conjoint part to the library. I can upload only the blocks (also the conjoint block).
When I insert then the conjoint block in the different survey, the choice tasks show up, but the options are empty.
How can this be solved?
Thanks and best regards,
Kati