f5 sharepoint tenacious session issue

This is f5 support answer for the issue: This is expected behaviour because the Sharepoint Deployment uses a Persistence Cookie which is required to edit/access Word,Excel,etc documents.The http client used by word,excel etc, must have access to the session cookie to pass through apm without getting redirected to the logon page. Transient cookies in browsers are not accessible by another program, as they are in memory. While persistent cookies are as stored in disk.

If you would not be editing documents in Sharepoint then you can disable the Persistence Cookie (Access Profile-->SSO/Auth Domains-->Cookie Options--->Persistent

Please be sure that you would not be editing documents in future as unchecking the Persistent Cookie would prevent you from this.If the above change is made,after closing the browser the session should be deleted.

Alternatively you could opt to use Portal Access for your deployment.