Losing session while using redis Driver

Hi guys,
I'm having problems with the redis driver and wanted to know if anyone has experienced the same issues

Platform: Codeigniter 3.1.9 PHP 7.2.1

If I try to make many subsequent AJAX calls I usually lose the session.

For example I try to call 10 different endpoints in subsequent calls. 
At least 1 of the calls will fail everytime when I use the redis driver, this does not happen if I'm using files for storing the session data.

It's not that the session is lost (if I open another tab and visit a page that's not ajax heavy I'll still be logged in)
But for an unknown reason codeigniter is not able to retrieve the session when it's making that many calls while using the redis driver

Has anyone experienced this issue?

Thanks a lot in advance