FS-4669 ok this FS console trace demonstrates your problem, try this patch

diff --git a/src/mod/endpoints/mod_sofia/sofia.c b/src/mod/endpoints/mod_sofia/sofia.c
index cfcc550eba944a619371f9ba63a298f0aa1d9026..7c1124383b4dc868ba6f1be5df19fa91d3f169f1 100644 (file)
--- a/src/mod/endpoints/mod_sofia/sofia.c
+++ b/src/mod/endpoints/mod_sofia/sofia.c
@@ -6759,7 +6759,7 @@ static void sofia_handle_sip_i_state(switch_core_session_t *session, int status,
                                                }
 
                                                if (switch_channel_test_flag(channel, CF_PROXY_MEDIA)) {
-                                                       if (sofia_glue_tech_proxy_remote_addr(tech_pvt, r_sdp) == SWITCH_STATUS_SUCCESS) {
+                                                       if (sofia_glue_tech_proxy_remote_addr(tech_pvt, r_sdp) == SWITCH_STATUS_SUCCESS && !is_t38) {
                                                                nua_respond(tech_pvt->nh, SIP_200_OK, TAG_END());
                                                                switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG, "Audio params changed, NOT proxying re-invite.\n");
                                                                switch_core_session_rwunlock(other_session);