Tested today on v30.0.2 and I am still seeing the copy/paste issue at times
This issue seems to happen when manually clicking objects while holding ctrl, the same objects when selected via dragging the box over them do not replicate the same issue.
Items selected manually then ctrl+c ctrl+v reliably fails in the following manner:

Interestingly at this point if I ctrl+z it seems to go back 2 steps but I can still ctrl+y back to where I actually was.