Here are some screenshots:
Step 1: I draw nodes and links like this
Step 2: I reshape the link as below:
Step 3: And I move the top node a little bit and as soon as I move the link Route got reset and it lost all the changes that I had done for the link.
I want the link to be as in the second drawing even after the top node ( in this case) is moved. and it should change only when I opt to change the link shape/route.
This reset happens during Copy-Paste as well.