Add-unique mode of rxui.select not trigger changes in options

[CrystalWindSnake]

from nicegui import ui
from ex4nicegui import to_ref, rxui, effect

r_str = to_ref(None)
r_opts = to_ref([])

@effect
def _():
    # Adding values in the select component does not trigger execution either.
    print(r_opts.value)

@ui.page("/")
def _():
    rxui.select(
        r_opts, clearable=True, value=r_str, new_value_mode="add-unique"
    ).classes("min-w-[20ch]")

    rxui.label(r_opts)

After typing 'a' in the select and confirming with Enter, the label below should display ['a'], but currently, there is no change.