Hi,
I've had a look now. I'm not sure if this is the same bug I was thinking of, but it's very similar. The new node is being created, but it's being made a child of the Planet 01 node and is inside it. You can see the node in the Node Network list as a child of the planet ( click the Planet 01 disclosure triangle to show it ).
I'll bring it up with Matt.
Regards,
Jo