Error when switching to the forum with Yandex - 400 Bad Request

RouterOS General
1

Hello!
In the transition from Yandex search engine to the forum (https://forum.mikrotik.com), an error occurs::
400 Bad Request
Request Header Or Cookie Too Large
nginx
Link: https://yandex.ru/yandsearch?text=gre%20bgp%20mikrotik

Screenshot:
c_007.png