Hi all.
I'm using Nevron Diagram.

I have the following problem:

In my diagram, y have 2 nodes conected by a line shape.
When I copy and paste this 3 shapes (using ctrl + C, ctrl + V), everything is Ok.
But, if the user do it dragging and pressing Ctrl key, the nodes are being copied disconected.

How can I avoid this? Is this a bug?
Thanks! I'm stuck in this since yesterday.

I also try using Diagram Designer that comes on installation and is the same behavior.