In this example : Undo/Redo
- Drop the start node on to the canvas.
- Mousedown on the port and drag it.
- Now while dragging press RIGHT CLICK.
Now the issue is that the port become detach from the start node. It should not be happen.
Please look in to the image below for better understanding.
Please help me to overcome this issue.
Thanks in advance.

This is a bug and will be fixed in one of the next releases.