Unpacking then repacking any widget misplaces it in the parent frame

Environment information

OS: win
python version: v3.10
pygame version: v2.1.2
pygame-menu version: v4.4.1

Describe the bug When a widget is unpacked then repacked, it is misplaced and merges with other widgets in the frame.

To Reproduce Execute this code then press on the "Do issue" button

import pygame_menu
import pygame
from pygame_menu.examples import create_example_window

#creating window
surface = create_example_window("window", (800,600))

#creating menu
menu = pygame_menu.Menu("menu", 800, 600, theme=pygame_menu.themes.THEME_DARK)

#creating a frame filling the menu to store the window content horizontally
frame0 = menu.add.frame_h(800, 540, padding=0)

#left frame, dark grey
frame1 = menu.add.frame_v(400, 540, background_color=(50,50,50), padding=0)
frame0.pack(frame1)

#right frame, light grey
frame2 = menu.add.frame_v(400, 540, background_color=(100,100,100), padding=0)
frame0.pack(frame2)

#a text label into frame1
label = menu.add.label("some title here")
frame1.pack(label,align=pygame_menu.locals.ALIGN_CENTER)

#a yellow image just under the label
srf = pygame.Surface((50,50))
srf.fill((255,255,0))
image = menu.add.surface(srf)
frame1.pack(image,align=pygame_menu.locals.ALIGN_CENTER)

#this one will never be unpacked
notmoving = menu.add.label("no i'm not moving")
frame1.pack(notmoving,align=pygame_menu.locals.ALIGN_CENTER)

#this function is supposed to unpacking then repacking the frames into frame1 with same configuration as before
def issue():
    frame1.unpack(label)
    frame1.unpack(image)

    #I want to do some stuff here that requires frame0 to have no children

    frame1.pack(label,align=pygame_menu.locals.ALIGN_CENTER)
    frame1.pack(image,align=pygame_menu.locals.ALIGN_CENTER)

#Putting a button with this function into the frame2
frame2.pack(menu.add.button("Do issue", issue),align=pygame_menu.locals.ALIGN_CENTER)

#window loop
menu.mainloop(surface)

Expected behavior The repacked widgets should not merge and should be centered; in this example nothing should move when pressing on "Do issue"

ppizarror / pygame-menu

Unpacking then repacking any widget misplaces it in the parent frame #466