Laravel Auth Session Lost in multi Requests or in the back button of google chrome

I used Laravel 5.2 version, I noticed that my website user Auth session lost when I used multi requests in great speed, Laravel saves the sessions in storage framework. the problem is maybe because the Laravel recreate another session file in the storage. ----- note 1: sometimes when I use google chrom button I get the same problem. ----- note 2: my website get another old session when I use back google chrom button -----note 3: the problem is not fixed the questions: --1- Why Laravel create new Sessoin file and why don't delete the old one? --2- Why Laravel lost Auth Session? --3- Why laravel get another old user session (huge problem)