My Wp-admin is being cached, I have noticed it because I have to reload every section in order to see it updated. I think it might be an Apache issue, something about the modules. I'm not gonna lie, It's my first time on an VPS and I enabled them all. Is there any modules that could be caching my admin?
After a little bit of research I think I have found the answer. It seems that OpCache was in fact caching my WP-Admin, I just had to blacklist the folder and seems to be working.