Python-Listbox item doesn't terminate when switching windows in Tkinter

I'm having an issue with my Python code, I'm using Tkinter to make an App and switch between windows, one of the windows has the following code:

def __init__(self, master):
    tk.Frame.__init__(self, master)
    master.title("Chain Targets:")
    master.geometry("400x800")
    tk.Label(self, text="Chain Targets").grid()
    self.sbox = tk.Listbox(master)
    self.sbox.grid(row=0, column=0)
    number=1
    for k in sorted(target_list, key=target_list.get, reverse=True):
        place_target= str(number) + "   " + k + "    " + str(target_list[k])
        self.sbox.insert(number,place_target)
        number+=1
    tk.Scrollbar.grid(self)

    tk.Button(self, text="Main Menu",
              command=lambda: master.switch_frame(MainPage)).grid()

Now this all works fine, except when using the switch_frame function the Listbox stays in the new screen, the switch_frame function is the following:

    def switch_frame(self, frame_class):
    """Destroys current frame and replaces it with a new one."""
    new_frame = frame_class(self)
    if self._frame is not None:
        self._frame.destroy()
    self._frame = new_frame
    self._frame.grid()

somehow I can't wrap my head around the fact that the self._frame.destroy() doesn't destroys the Listbox and it stays in every window in the top, for the rest my code does everything it's intended to do. I hope someone has an idea of what I am missing.