Hide nesting connector when class is dragged inside package

I have a class that is a child of a package. At least I think so, because the class is shown below the package in the model explorer.

I created a class diagram and dragged the package and the class into it. When I move the class into the package box, I expected the nesting connector to disappear automatically. But it doesn’t, do I have to hide it manually. Is this intended? What is the correct way to make them look like e. g. at http://knowhow.visual-paradigm.com/diagramming/master-view/ ?

(It’s build 20150204)

Thanks for your help!