Possible issue with an iRule

[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
     Remove www. from the host header value if it is present
    scan [string map {www. ""} [string tolower [HTTP::host]]] {%[^.]} host
    log local0. "[IP::client_addr]:[TCP::client_port]: Parsed $host from [HTTP::host]"

    switch $host {
        "domain" -
        "wsecure" -
        "ssl" {
             do something
        }
        default {
            log local0. "[IP::client_addr]:[TCP::client_port]: Matched part of $host, redirecting"
            HTTP::redirect "https://www.domain.com/MS/RedirectMS?site=hub&value=$host"
        }
    }
}
}

[root@ve1023:Active] config  curl -I http://www.abc.com/test
HTTP/1.0 302 Found
Location: https://www.domain.com/MS/RedirectMS?site=hub&value=abc
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve1023:Active] config  
Nov 14 07:29:34 local/tmm info tmm[4766]: Rule myrule : 172.28.65.150:46973: Parsed abc from www.abc.com
Nov 14 07:29:34 local/tmm info tmm[4766]: Rule myrule : 172.28.65.150:46973: Matched part of abc, redirecting

[root@ve1023:Active] config  curl -I http://abc.com/test
HTTP/1.0 302 Found
Location: https://www.domain.com/MS/RedirectMS?site=hub&value=abc
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve1023:Active] config  
Nov 14 07:29:43 local/tmm info tmm[4766]: Rule myrule : 172.28.65.150:46974: Parsed abc from abc.com
Nov 14 07:29:43 local/tmm info tmm[4766]: Rule myrule : 172.28.65.150:46974: Matched part of abc, redirecting