Steps to reproduce the issue

Log in (tested with the Super User Account) and allow the session to expire. Log back in.

Expected result

Your session has been re-established since you provided proper credentials.

Actual result

A statement claiming your session has expired and asking you to log in, yet again.

System information (as much as possible)

PHP Built On Linux xxx x86_64
Database Version 5.5.45-cll-lve
Database Collation latin1_swedish_ci
PHP Version 5.4.43
Web Server Apache/2.4.12
WebServer to PHP Interface cgi-fcgi
Joomla! Version Joomla! 3.4.8 Stable [ Ember ] 24-December-2015 19:30 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0

Additional comments

This happens in both front-end and back-end portions of the site and this installation of Joomla! has no plugins.