More elements created compared to copied ones when executing 'New From Clipboard' command

[asimic]

Create new map, e.g. adding few elements - each as a child to last created node
Select Main node and the 'Select subtree'

Copy selection
From File menu item choose 'New From Clipboard'
Instead of selected/copied map, a new map has more elements

Similar effect can be reproduced with 'Select all children'