A Group containing >10 nodes (Ellipses in my example) is child of another Group. That parent Group has a transformation applied to it (a Rotation). Now when I make the childnodes draggable, and I drag them outside of the layoutBounds of their immediate parent Group, they disapear and stop receiving events afterwards.
This does not occur when:
- 10 or less nodes are in a Group,
- when no transformation is applied to the parent Group,
- when I run ScenicView and highlight the group containing the different nodes.

I posted this also here with a piece of code that demonstrates the problem (can't seem to find a way to attach the code to this issue):
http://stackoverflow.com/questions/14096594/dragging-nodes-when-their-parent-has-a-transformation-results-in-nodes-disappear
https://forums.oracle.com/forums/message.jspa?messageID=10772125#10772125