Load Balancer Stickiness

Hi,

We deployed Rancher LB on many host and set the Stickiness conf with cookie.
Our problem is depending on which host catch the request, it give it a different cookie.

Ex : request 1 arrived, LB on host 1 give it a cookie => We can see cookie A in the browser
request 2 (sent with cookie A) arrived on LB on host 2 => LB of Host 2 give to the request a new cookie

If req 1 and 2 arrived on the same LB/Host, then cookie is the replaced.

Any idea ?

Thanks.