Sorry for the delay in response. I would like to follow up on your issue. Are you still experiencing the issue on the latest version of XD 30.1 or it has been resolved?
We will try our best to help.
The XD I use is the latest version, AI is cc2020 version 24, is win10 system version 1909, and I use MAC 10.15.4 at home. With the same XD and AI version, I can copy and paste freely into both software, which can be edited as vector.4444