Avoiding Duplicate Cookies
From AgileApps Support Wiki
The application sets a cookie with a different path value multiple times with the same response.
Browsers will accept only one of these values; typically the value in the last header. Servers should not include more than one Set-Cookie header field in the same response with the same cookie name. The application should be configured to not return multiple “Set-Cookie” HTTP headers in the same response with the same name.
To resolve this issue, open the context.xml file from the <Install directory>/profiles/IS_default/configuration/tomcat/conf folder. Edit the <Context> tag to set it as follows: <Context sessionCookiePath="/">