But don't know why still, around 6 out of 10, scenarios fails completely in browser

Well, the new code you posted you use  print $cgi->header(); but this will never prints a session cookie, CGI.pm doesn't know anything about CGI::Session, see Re: CGI::Session "cache" issue, use $session->header, otherwise there is no session . no cookie means no sessionid means no session -- it may exist on the server, but the browser doesn't know anything about it (doesn't exist)

fails completely in browser and command line mode.

how are you passing the sessionid on the commandline?

In reply to Re^5: ie with cgi::session not showing same session id which it was set and firefox doesn't show at all by Anonymous Monk
in thread ie with cgi::session not showing same session id which it was set and firefox doesn't show at all by msinfo

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