The scope does not update the position. If you do not move the cursor and fly somewhere, the sight will move away from the player. It is convenient to fix on towers, but the movement of the sight is jerky, because it instantly teleports if you move the mouse. It is better to make fixation on the tower through the right mouse button.
Cursor disappears after death. If you go back to the menu after death, the cursor will disappear and you will have to poke at random.