Just started using v5.4.0 on our system and I noticed a change in behavior when doing the append_branch, t_load_contacts, and t_next_contacts combo.  Previously using v5.3.4 and it appears to be fine.

Here's the call scenario: Kamailio receives a call to sip:1001@carrierB.  Kamailio sees carrierB and appends 2 contacts: gateway1.carrierB.com;q=0.3 and gateway2.carrierB.com;q=0.2.  After t_load_branches(0), I expect to see $rd to be changed to gateway1.carrierB.com, but it's not.

This is the piece of config I'm trying to debug:

        xlog ("=== branch 0: $(branch(uri)[0]), $(branch(q)[0])\n");
    xlog ("=== branch 1: $(branch(uri)[1]), $(branch(q)[1])\n");
    t_load_contacts(0);
    while (t_next_contacts()) {
        xlog ("=== rd = $rd\n");
    }

This is the log I get.  It appears to use the backup contact first.