[JAVA3D] is this a bug or is it meant to be this way?

[ajaxinc]

BG1                                       |                                     TG1                                       |                                     BG2                                       |                                     TG2                                       |                                     SHP1   here BG1 and BG2 are branchgroup nodes, TG1 and TG2 are transformGroup nodes and SHP1 is shape3D node. SHP1.setPickable(false) BG1.setPickable(false) BG1.setPickable(true)   after this SHP1 is also pickable. Is it meant to be this way or SHP1 should not be pickable. Because in my case SHP1 becomes pickable