While navigating in Jenkins GUI, you are redirected to the login page. In the upper right corner, the user is still showing as logged in. The logout button is still there (as opposed to the sign in button).
Environment
CloudBees Jenkins Enterprise
Jenkins
Tomcat
Resolution
The following setting Tomcat system property needs to be set: -Dorg.apache.tomcat.util.http.ServerCookie.FWD_SLASH_IS_SEPARATOR=false