Cart Class Issue

I Am Building an E-commerce Site Using Codeigniter 3. The site was Running fine until i faced a huge bug in the cart class of the system.

The CI Cart or Session Class Does  not Matches user ip address by default and also if there is anything in the session of cart  class from one ip address and if it remains as it is from that ip and someone else from another ip address adds something in the cart session... the old session data from the other ip gets included into the new users data


it seems to be a real issue or m i missing something???