Got some time for it ... according to the logs the route set is seen empty by the dialog module (you can search for route_set in the logs).
I need more data to troubleshoot:
* grab the pcap with sip packets for such a call * add following in your config before doing the test.
At the top of request_route block add:
``` xlog("received request from $si with content [[$mb]]\n"); ```
At the top of reply_route (add it if you don't have it):
``` xlog("received reply from $si with content [[$mb]]\n"); ```
Also add the global parameter:
``` log_prefix="{$mt $hdr(CSeq) $ci} " ```
Put the pcap file and the logs file in a tarball or zip and send it to me.