Since moving my board to a different server with same config (phpbb3.1.10, Debian 8, nginx, php5.6.30, mariadb, sphinx, memcache, cloudflare) I have problem with caching unread posts. When I click on Unread posts, click on any unread topic, reply (or not), click on unread posts again i still have this topic in my unread posts. I have to refresh my browser for it to disappear.
Tried using file cache, restarting server, still same thing happens. I have MariaDB query cache disabled. Thank you for help.