```Stack``` animation is not working when downsizing

[lekshmanmj]

Description

Stack animation is working on increasing size, but it's not working while decreasing size

Code example to reproduce the issue:

import flet as ft
def main(page: ft.Page):
    page.vertical_alignment = ft.MainAxisAlignment.CENTER
    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
    def on_click(e):
        if stack.height == 100:
            stack.height = 200
        else:
            stack.height = 100
        stack.update()

    c = ft.Container(
        bgcolor= ft.colors.RED,
        height= 200, # container with height more than initial stack height to demonstrate the abnormality of stack
        width= 100,
        on_click= on_click
    )
    stack = ft.Stack(
        controls= [
            c
        ],
        width= 100,
        height= 100,
        animate_size= 500
    )
    page.add(stack)
ft.app(main)

Describe the results you received:

Screencast from 2024-03-20 23-10-17.webm

Describe the results you expected:

To shrink in size with animation

Flet version (pip show flet):

Name: flet
Version: 0.21.2
Summary: Flet for Python - easily build interactive multi-platform apps in Python
Home-page: 
Author: Appveyor Systems Inc.
Author-email: [email protected]
License: Apache-2.0
Location: /home/lekshman/bbb/bbb_env/lib/python3.12/site-packages
Requires: cookiecutter, fastapi, flet-runtime, packaging, qrcode, uvicorn, watchdog
Required-by: 

Operating system:

Kali Linux - A Debian based OS