Это проблемы с javascript.
Отключайте кеширование, ккк и проверяйте в консоле браузера какие ошибки возникают при смене регионов.
Кеш оключен ккк тоже.
В консоле висит три оповещения.
quick-order:1 [DOM] Found 2 elements with non-unique id #id_gender1: (More info:
https://goo.gl/9p2vKq) <input type="radio" name="id_gender" id="id_gender1" class="np-input-radio" value="1"> <input type="radio" name="id_gender" id="id_gender1" value="1">
quick-order:1 [DOM] Found 2 elements with non-unique id #id_gender2: (More info:
https://goo.gl/9p2vKq) <input type="radio" name="id_gender" id="id_gender2" class="np-input-radio" value="2"> <input type="radio" name="id_gender" id="id_gender2" value="2">
quick-order:1 [DOM] Found 3 elements with non-unique id #search_query_block: (More info:
https://goo.gl/9p2vKq) <input class="search_query form-control grey ac_input" type="text" id="search_query_block" name="search_query" value autocomplete="off"> <input class="search_query form-control grey" type="text" id="search_query_block" name="search_query" value> <input class="search_query form-control grey" type="text" id="search_query_block" name="search_query" value>
quick-order:1 [DOM] Found 3 elements with non-unique id #searchbox: (More info:
https://goo.gl/9p2vKq) <form method="get" action="//test.dom-optiki.ua/search" id="searchbox">…</form> <form method="get" action="//test.dom-optiki.ua/search" id="searchbox">…</form> <form method="get" action="//test.dom-optiki.ua/search" id="searchbox">…</form>
A cookie associated with a cross-site resource at <URL> was set without the `SameSite` attribute. A future release of Chrome will only deliver cookies with cross-site requests if they are set with `SameSite=None` and `Secure`. You can review cookies in developer tools under Application>Storage>Cookies and see more details at <URL> and <URL>