Stickiness cookie only on certain services


I got the following stack:

The LB is set to direct traffic to different services according to paths. The LB has also the sticky session option activated.

The sticky cookie is generated from the start when i get on the landing-page service (nginx), then i get to the wand service (jetty) and i have the same sticky cookie, which is good. When i get to the wand-help service (nginx), which is opened in a new tab the sticky session cookie changes, this leads to me being disconnected from my main app.

I there any way for me to control which service will generate a new cookie?