quick3d: set property 'parent' of Node not work

the position/rotation can't work as expected after set parent of Node.

I found some info in qquick3dobject.cpp, if that it true, how to change 'parent' after created?

 \note Currently for 3D items to be correctly handled by the scene manager
when parenting 3D objects from C++ it is necessary to call
QQuick3DObject::setParentItem before the QObject::setParent. This requirement is
likely to change in a future release though.

I like using parent to define Node / Joint relation, but not nested model.