Calling Object.AddChild on an object will NOT update the childs position / orientation when the child object is at exactly 0,0,0.

This was tested with Triggers, I did not test it with other objects.

Create an object at 0,0,0 - do not update its orientation. Add it as a child to another object. Its position will remain at world 0,0,0.

Object should be parented to the center of the object and stay on position