[SR-Users] Does kamailio has some headers optimizing mechanism ?

Hello, I have a following part of code: if (route(Test_TO_Dialer)) { append_hf("P-hint: Loose Routing. Re-INVITE Detected: Uplink --> Originator.\r\n"); xlog("********** loose_route(): Detected Re-INVITE from Uplink! **********\n"); setflag(1); # do accounting append_hf("P-hint: SDP was mangled\r\n"); python_exec("ParseSDP", $mb); fix_nated_contact(); setbflag(6); # Mark as NATed rtpproxy_manage(); dlg_manage(); } But in a logs I see: P-hint: Loose Routing. Re-INVITE Detected: Uplink --> Originator., SDP was mangled but it should be like this: P-hint: Loose Routing. Re-INVITE Detected: Uplink --> Originator. P-hint: SDP was mangled Does kamailio has some headers optimizing mechanism ? # ./kamailio -V version: kamailio 3.2.3 (x86_64/linux) flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 4MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled on 15:37:11 Jun 9 2012 with gcc 4.4.3