why does the port on the flet change even though it's already set?

[bobwatcherx]

I have a little problem, why I have set the port on the flet, but the fleet keeps randomizing the port when running with hot reload mode
I want to make Github oauth like in your documentation, but it looks like the port problem changes, so it can't callback properly
code :

import os

import flet as ft
from flet.auth.providers.github_oauth_provider import GitHubOAuthProvider

def main(page: ft.Page):

    provider = GitHubOAuthProvider(
        client_id=os.getenv("GITHUB_CLIENT_ID"),
        client_secret=os.getenv("GITHUB_CLIENT_SECRET"),
        redirect_url="http://localhost:8550/api/oauth/redirect",
    )

    def login_click(e):
        page.login(provider)

    def on_login(e):
        print("Access token:", page.auth.token.access_token)
        print("User ID:", page.auth.user.id)

    page.on_login = on_login
    page.add(ft.ElevatedButton("Login with GitHub", on_click=login_click))

ft.app(port=8550, target=main)

my Command terminal

minto@minto-Lenovo-V145-14AST:~/belajar/fletApp/flet5$ flet main.py -d
http://127.0.0.1:45509
mesa: for the --simplifycfg-sink-common option: may only occur zero or one times!
mesa: for the --global-isel-abort option: may only occur zero or one times!
mesa: for the --amdgpu-atomic-optimizations option: may only occur zero or one times!
Fontconfig error: Cannot load default config file: No such file: (null)

however when opened in a random port browser it works fine

[FeodorFitsner]

When running with flet CLI the port specified in the code is ignored.

You have to specify port in the command line:

flet main.py -d -p 8550