<p>I just ran some tests and it does look like the CSeq is being sent with a different value between the two.  I see <code>CSeq: 2 INVITE</code> going to homer and <code>CSeq: 4 INVITE</code> going to FreeSwitch for the same message.</p>

<p>If you like the solution I proposed above (the msg_send_metadata() one) and can't think of any issues it would cause I can get that implemented with a PR.</p>

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