route or cache in Laravel project - php

Question

I have a Laravel 5.4 project. There is a route issue that i can't solve second day.
I have two routes like:
Route::get('/', 'HomeController#index')->name('index');
public function index(CookieJar $cookieJar, Request $request)
{
// Берем город из куков
$city_from_cookie = Cookie::get('city');
// Если города нет в куках
if (!$city_from_cookie) {
$client = new Client();
$ip = $request->ip() == '127.0.0.1' ? '95.85.70.7' : $request->ip();
$json = $client->request('GET', 'http://freegeoip.net/json/' . $ip . '');
$city = json_decode($json->getBody()->getContents());
if ($city->city === null) {
$cookie = cookie('city', config('custom.city.default_slug'), 21600, null, null, false, true);
$cookieJar->queue($cookie);
$city = config('custom.city.default_slug');
} else {
$city = strtolower($city->city);
try {
$city = City::findBySlugOrFail($city);
$city = $city->slug;
} catch (ModelNotFoundException $ex) {
$city = 'moskva';
}
$cookie = cookie('city', $city, 21600, null, null, false, false);
$cookieJar->queue($cookie);
}
} else {
$city = $city_from_cookie;
}
return redirect(route('city', [$city]), 301);
}
AND
Route::get('{city}', 'HomeController#getCityCategories')->name('city');
public function getCityCategories(City $city, CookieJar $cookieJar)
{
// Cache::flush();
// dd(request()->getRequestUri());
$cookie = cookie('city', $city->slug, 21600, null, null, false, false);
$cookieJar->queue($cookie);
$categories = Category::whereNull('parent_id')->with('subcategories')->get();
if ($city->weather_id) {
$weather = $this->getWeather($city->weather_id);
} else {
$weather = [
'city' => '',
'temp_min' => '',
'temp_max' => '',
'day' => '',
'symbol' => '',
'symbol_desc' => ''
];
}
return view('pages.categories', compact('categories', 'city', 'weather'));
}
The problem is that if you go to the '/' root first time method will do it's work but when you're getting the city like /moskva and if you change your city with another for example /abakan and then go the root '/' you will be redirected to the /moskva. I tried almost everything, turned off any cahing, cleared cache with artisan commands but it does not helped. Here is domain for testing this issue: okololo.ru