How to bypass composite caching in Bitrix?

Question

1C-Bitrix

Greetings.
In the product card, I determine the city by the user's ip.
To defeat caching, I implemented this code in component_epilog.php.
But still, the foreign city is cached. After the second reload of the page, the city rises as needed.
I'm assuming that's how composite mode caches?
How to bypass it so that the code is executed completely bypassing the cache?

AddEventHandler('main', 'OnEndBufferContent', 'SetDeleveryInfo');
 ...

    $City = $_SESSION['RSLOCATION']['LOCATION']['CITY_NAME'];

        If (empty($City)) {
            $City = CRS_Location::GetCityName()['CITY_NAME'];
            if (!empty($City)) {
                $_SESSION['RSLOCATION']['LOCATION']['CITY_NAME'] = $City;
            }
        }

        if (empty($City )) {
            if (\Bitrix\Main\Loader::includeModule('olegpro.ipgeobase')) {
                $arIpGeo = \Olegpro\IpGeoBase\IpGeoBase::getInstance()->getRecord();
                $City = $arIpGeo['city'];
                if (!empty($City)) {
                    $_SESSION['RSLOCATION']['LOCATION']['CITY_NAME'] = $City;
                }
            }
        }

Answer 1

g-rain-design.ru/blog/posts/bitrix-composite-cache there is an interesting article, you can look