CakePHP / Session Variables are Randomly Getting Dropped when Paginating

Question

I am storing values in my session in one of my AJAX calls. The session is getting overwritten correctly. But when I make some other call (AJAX or non-AJAX), the session value is lost. This doesn't happen every time but in most of the cases. My security level is on medium already.

here is the controller function and the view : http://bin.cakephp.org/view/1623990067