Thank you for contacting us and sharing your feedback.
You are right that url generated from copy to clipboard button is not correct when the item is still being created. We have logged that as a bug in our TeamPulse project and a possible solution will be to disable the button until the work item is actually saved.
I hope you enjoy using TeamPulse, and if you have any problems or feedback do not hesitate to contact us at any time.
the Telerik team