[SR-Users] websocket double record_route()

Hello. I'm trying to configure kamailio as a gateway between Websocket and TCP/TLS transports. When I call record_route() for an initial INVITE that comes via WS and will be forwarded via TCP to a registered UA kamailio inserts only a one record-route header with its IP and transport=ws instead of two record-route headers with both incoming/outgoing transports. This behaviour breaks in-dialog requests routing. rr module parameters are: modparam("rr", "enable_full_lr", 1) modparam("rr", "append_fromtag", 0) modparam("rr", "enable_double_rr", 1) I use: - kamailio-4.0.2 - sipml5 as sip client Can anybody point me in the right direction to understand why it happens ?