[Freeswitch-users] NAPTR and TCP transport

If I specify a bridge destination as "sofia/external/USER@DOMAIN", and that domain has a NAPTR record specifying TCP transport as more preferred, FreeSWITCH is still sending a UDP INVITE. If the domain has only a NAPTR record for TCP transport, the call fails without sending any INVITE. It works with TCP if I add ";transport=tcp" to the bridge string. does this look like a bug, or it was set so with some reason?