User switching in my back and front

What happens, when I refresh the page a few times or simply browse inside it, my user switches to another user registered in the system, but only in chrome.
Could someone tell me what this bug is or how to solve it?

Hi Deivd, could you elaborate a little bit more?

What is your “system”? How are you validating your users? Do you have a custom db or is using a plugin for user management?

I use all native yii, the db use postgree and validation would be the very basic for the user to log in, the problem is that during the session the user is being exchanged for another user.