Ali Jawad writes:
However I did notice the following in the logs
Aug 28 13:41:02 [8564] DBG:core:parse_msg: uri: sip:michofr@193.227.186.146:3218;transport=UDP;rinstance=D98C1DD404B200 8F980980E97E42F8EC;nat=yes
the party sending bye should use as request uri contact uri of the other party that it learned during dialog setup (invite, 200 ok). check that there was transport=tls.
-- juha