We’ve noticed an incorrect behavior with the Gumball, and I believe this happens only when working within a RhinoArtisan scheme. Could you have any idea what might be causing this? In RhinoArtisan, we don’t modify anything related to the Gumball.
This looks like history is preventing you from moving the part. I’d bet you have “lock children” checked int eh history dialog at the bottom of the screen.
try the HistoryPurge (all) command and see if the part starts to behave.