There is a way, of sorts.
1) Select existing shape
2) Move pointer outside shape(*)
3) press P (or click the 6-spot shape in the tools palette).
This creates a "parallel" way, ie a geometrically similar shape (but a different adjustable size) with the same geometric centre, which will become visible as a thin black line when you move the pointer
4) move 3) "wobble" the pointer inwards until slightly, firstly to make the new shape coincides visible and then to make it coincide with the old
old shape
5) 4) click.
The cloned shape is now highlighted and can be dragged to the required position.
(*) obviously Obviously it would be easier more elegant if you could omit (2) and (4) step (3) thereby creating a shape which is automatically the right size, but for some reason this creates a shape missing the last final edge. I would call that a bug. The same thing happens if you do (5) without (4).bug.