Xenforo cache and Wordpress cache are separate stuff, not the same, each one has separate cache plugin.
Your Xenforo as a subdirectory domain,
https://www.dlife.in/forums/ , it doesn't have cache hit header at all.
If Xenforo doesn't use cache, Xenforo will talk to the backend, If anything wrong, It is Xenforo itself or Xenforo configuration's problem, nothing to do with cache, or LSWS web server.