Flet is awesome!

This feels a bit counterintuitive (you are deleting something defined later in code) but it works:

import flet as ft

def main(page: ft.Page):
    def on_keyboard(e: ft.KeyboardEvent):
        page.remove(cntnr)
        page.update()

    page.on_keyboard_event = on_keyboard

    cntnr = ft.Container(width=100, height=100, bgcolor=ft.colors.RED)
    page.add(cntnr)

if __name__ == "__main__":
    ft.app(target=main)

If I define and add a container first and add a keyboard callback to do something to that defined container later then keyboard callback suddenly doesn’t work (keypresses are getting ignored and I just hear beep sounds on keypresses):

import flet as ft

def main(page: ft.Page):
    cntnr = ft.Container(width=10, height=10, bgcolor=ft.colors.RED)
    page.add(cntnr)

    def on_keyboard(e: ft.KeyboardEvent):
        page.remove(cntnr)
        page.update()

    page.on_keyboard_event = on_keyboard

if __name__ == "__main__":
    ft.app(target=main)

Why is it like this?
Am I missing something in Flet documentation?

This was only tested on Mac for now but I think it’s reproducible on Linux and Windows as well.
Is it a bug?

https://flet.dev/docs/cookbook/keyboard-shortcuts