[Question] ft.TextField loses focus after each character entered if Key param is used

[SergeiVasilyev]

Question

I'm making dynamically created fields and trying to access them using the Key parameter, but then focus is lost after every character entered.

Is this normal behavior when using keys?
Why does this happen and how can I solve it?

Fucus.in.TextField.mp4

Code sample

import flet as ft


def test_field_focus(page: ft.Page):
    card_container = ft.Column(
        controls=[
            ft.Card(
                content=ft.TextField(
                    label="term",
                    border="underline",
                    # key="term_0", # here
                ),
            key="card_0", # or here
            )
        ]
    )

    page.add(card_container)


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

Error message

No response

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