APM Session - "not_started" discard

Hi, I have a policy that are not killing "not_started" sessions. And, the session list is daily increasing because of these "not_started" and "in_progress" sessions. Should not the policies, kill those uninitialized sessions when session timeout values were reached? Need I to put some "Windows Cache and Session Control" to a session control?

 

I'm talking about policy on "LTM-APM" profile type and BIG-IP v11.6.1.

 

What I forgot to do?

 

Thank you in advance.