Setting SearchBar.bar_border_side isn't visually honoured

[ndonkoHenri]

Hi,
I'm trying to set 'bar_border_side', but it has no effect in the SearchBar.
I tried your own example, but nor border is displayed

import flet as ft


def main(page: ft.Page):
    page.window.always_on_top = True
    page.theme_mode = ft.ThemeMode.LIGHT
    page.add(
        ft.SearchBar(
            controls=[ft.ListTile(title=ft.Text("Hello"))],
            view_header_height=30,
            on_tap=lambda e: e.control.open_view(),
            width=350,
            view_size_constraints=ft.BoxConstraints(max_height=170, max_width=350),
            bar_hint_text="Search",
            bar_padding=ft.padding.symmetric(10, 10),
            bar_border_side=ft.BorderSide(color=ft.Colors.BLUE, width=2),
            view_side=ft.BorderSide(color=ft.colors.RED, width=2),
        )
    )


ft.app(main)

Originally posted by @ClearSafety in #4039 (comment)