Hello!
My topology is like this: PBX -> Kamailio Topos -> User
When calling the user, PBX does not add the user part in the Contact URI, something like: Contact: sip:10.10.10.10:5080;transport=udp
When the customer sends a reinvite, the topos turns off for this transaction and the sip partially breaks down with error:
topos [tps_storage.c:319]: tps_storage_fill_contact(): no r-uri user topos [tps_storage.c:615]: tps_storage_record(): failed to store
As far as I understand, the RFC allows the absence of the user part in the URI and this occurs quite often. I can provide the pcap file and debug log in a private message if this helps identify the essence of the problem.
# kamailio -v version: kamailio 5.7.1 (x86_64/linux) 1cf389-dirty