https://www.drupal.org/node/2768869
Nginx fastcgi_cache_valid TTL logic is incorrect [#2768869] | Drupal.org
Nov 4, 2016 - This is probably related to [#2097673] Nginx should not cache 302 responses, or at least it should use the lowest possible value for DoS protection (1s). There...
nginxfastcgicachevalidttl