I'm running WordPress Network on Nginx Web Server and I'm facing some issues when any user tries to login. If the user tries to login without any of website earlier login data (cache and cookies), they'll authenticate successfully for some time or temporarily.
But if the browser restarts or they follow any link within the page, their session is lost. In my case I tried to access user-settings page and got kicked out of the session.
That what happens if I try to login again without clearing the site's cookies and cache on current browser.
I think there's something that terminates users session abruptly. And may be the root of login issues in my site. Please, help.