KeyValue UI not updating after $set(), but the value is changed

return $form
    ->schema([
        ...
        Forms\Components\KeyValue::make('meta'),
        ...
        Forms\Components\Actions::make([
            Forms\Components\Actions\Action::make('button')
                ->action(function (Set $set) {
                    $set('meta.a', 'foo');
                    $set('meta.b', 'bar');
                    $set('meta.c', 'baz');
                }),
        ...