Rigidbody.velocity works diffrent on cloned object

Those three lines definnes how my item moves when i pick it. It becomes my child and always keep pos.x, y and z constant depending on parent. But when i clone one object like this:

 Rigidbody Copycube = Instantiate(cube, PickGuide.transform.position, Quaternion.identity);

and pick it, It does not works the same. It becomes child my child but does not keep same the same position( relative to me) then i walk

 item.velocity = Vector3.zero; 
 item.angularVelocity = Vector3.zero;
 item.transform.SetParent(PickGuide.transform);

Then i changed to

  item.velocity = Vector3.zero; 

to

 item.transform.position = SpawnPoint.transform.position;

then picked object teleports on my face but it works with cloned objects. Then what is wrong with rb.velocity or cloned object?