→Redirect sticky address
Some protocols need sticky-session in order to load-balance properly, like FTP where the control- (21) and data-connection must end up on the same backend server, or web-sessions which doesn't have a shared session store. The load-balancer uses the firewalls source tracking cache to keep track of previous redirect from a particular source address (IP). This cache has two parameter, one of which you may need to change primarily for web applications.
In the configuration editor, you may set these values
set timeout src.track X