Is CI session management broken?

You need to configure the garbage collector. It can be disabled. To do this, set the values in php.ini or set in the file app/Common.php. And execute crontab with session_gc() every day/hour
https://www.php.net/manual/en/session.co...robability

PHP Code:

ini_set('session.gc_probability', 1);
ini_set('session.gc_divisor', 1000); 


Simple CI 4 project for beginners codeigniter-expenses ( topic )