[Question] Why is on_change not called when programmatically changing the dropdown value?

[Wintreist]

Question

There is a list of dropdown options.
I want to pre-set a certain value for dropdown, and since I'm doing this for the user, I want on_change OptionalEventCallable to be called.

Code sample

def main(page: ft.Page):
    disk_usage = DiskUsageWidget()

    def fill_usage_info(option):
        import time

        disk_usage.set_text("")
        time.sleep(3)
        disk_usage.set_current_usage(
            occupied_space=1099511627776,
            total_space=6597069766656,
        )

    server_options = [
        ft.DropdownOption(key=server.value, text=server.name) for server in Servers
    ]
    server_cmbx = ft.Dropdown(
        options=server_options,
        on_change=fill_usage_info,
    )
    page.add(
        ft.Column(
            [
                ft.Row(
                    [
                        ft.Text("Server:"),
                        server_cmbx,
                    ]
                ),
                disk_usage,
            ]
        ),
    )
    server_cmbx.value = Servers.MyServer.value
    page.update()


ft.app(main)

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.