Clone a ticket should ask where to place new (cloned) ticket.

If you clone, the cloned tickets goes next the the position of the basic ticket.
Users want to select, where the new (cloned) ticket should be placed (in a current sprint or in the backlog).

Main Problem: If you clone a ticket in a running sprint, the reporting (Burn-Down) is completely destroyed. First effort is added and then reduced immediately, if you remove the cloned ticket (just in the same minute it is counted)