<p>Further investigation shows that the database loses b_contact when the called side sends the session timer reINVITE.</p>
<p>At beginning of the call:</p>
<pre><code>*************************** 1. row ***************************
id: 762
rectime: 2017-03-08 09:29:13
s_method: INVITE
s_cseq: 2
a_callid: DaDWA2PfEHrzY2yHo-7UmQ..
a_uuid: atpsh-58bf061d-69c4-4
b_uuid: btpsh-58bf061d-69c4-4
a_contact: sip:xxxxxxxxx@10.50.50.50:32709;transport=UDP
b_contact: sip:2500991234@10.20.0.224:5060
as_contact: <sip:atpsh-58bf061d-69c4-4@10.10.0.180>
bs_contact: <sip:btpsh-58bf061d-69c4-4@10.10.0.180>
a_tag: 976c020a
b_tag: as22aeaf5f
a_rr:
b_rr: <sip:10.10.0.177:5065;lr=on>
s_rr: <sip:10.10.0.180;lr;ftag=976c020a;dv=aae.5ab1>
iflags: 2
a_uri:
b_uri:
r_uri:
a_srcaddr:
b_srcaddr:
a_socket:
b_socket:
</code></pre>
<p>If the call is ended at this point, the BYE is sent correctly.</p>
<p>However, when the called side's session timer expires and it sends a reINVITE, the database changes to this:</p>
<pre><code>*************************** 1. row ***************************
id: 762
rectime: 2017-03-08 09:29:13
s_method: INVITE
s_cseq: 2
a_callid: DaDWA2PfEHrzY2yHo-7UmQ..
a_uuid: atpsh-58bf061d-69c4-4
b_uuid: btpsh-58bf061d-69c4-4
a_contact: sip:xxxxxxxxx@10.50.50.50:32709;transport=UDP
b_contact: <--- this is now blank
as_contact: <sip:atpsh-58bf061d-69c4-4@10.10.0.180>
bs_contact: <sip:btpsh-58bf061d-69c4-4@10.10.0.180>
a_tag: 976c020a
b_tag: as22aeaf5f
a_rr:
b_rr: <sip:10.10.0.177:5065;lr=on>
s_rr: <sip:10.10.0.180;lr;ftag=976c020a;dv=aae.5ab1>
iflags: 2
a_uri:
b_uri:
r_uri:
a_srcaddr:
b_srcaddr:
a_socket:
b_socket:
</code></pre>
<p>If the call is ended by the caller after this, it sends <code>BYE sip:10.10.0.177:5065;lr=on SIP/2.0</code> instead of <code>BYE sip:2500991234@10.20.0.224:5060 SIP/2.0</code> as expected.</p>
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