Issues with Handles not being at a right position

Hey fellow developers! I encountered this problem, to set couple of position vectors in my game object I use Handles.FreeMoveHandle method and for cap function I use Handles.RectangleCap. Everything works fine, I can move those rectangle caps freely and position vectors change according to them. The problem is, when I move my game object from the center coordinates, those rectangle caps doesn't move with it. Here is my code:

 mb.firstPos = Handles.FreeMoveHandle(mb.firstPos,
                         Quaternion.identity,
                         0.08f,
                         Vector3.zero,
                         Handles.RectangleCap);

And here is some screenshots:

How it should stay

How it gets

Thank you in advance!