I think I found a serious bug in GoDiagram 18.104.22.168
Found bug in GoLink:
If I drag one of the points of a link which is connected to two nodes,
and then relink one of them to another node the link-structure of the GoObject is broken.
GoLink.FromNode and GoLink.ToNode will no longer work correctly because there is an exception in them.
The object seems to be permanently selected, too.
No matter if you click on the background or onto another object.
Can you reproduce this in any of the sample applications?