Hello!

I'm facing a problem with a call scenario with an in-dialog INVITE just after the call has been picked up.

Freeswitch receive on his leg B this in-dialog INVITE. Not forwarded to leg A.

In a SIP trace, I can see 406 Not Acceptable on leg B whereas there is no difference in the Media except "Bandwidth Information" which is "AS:80" versus "AS:82" in the RE-INVITE.

I turn on the logs on debug, but nothing specific appears. The first thing:

3f6d8dd1-5415-4a58-a948-551d841cf5dd 2021-06-11 10:34:12.873542 [NOTICE] sofia.c:1012 Hangup sofia/internal/ABC [CS_EXCHANGE_MEDIA] [NORMAL_CLEARING]

3f6d8dd1-5415-4a58-a948-551d841cf5dd 2021-06-11 10:34:12.873542 [DEBUG] switch_ivr_bridge.c:787 BRIDGE THREAD DONE [sofia/internal/ABC]

3f6d8dd1-5415-4a58-a948-551d841cf5dd 2021-06-11 10:34:12.873542 [DEBUG] switch_core_state_machine.c:653 (sofia/internal/ ABC) State EXCHANGE_MEDIA going to sleep

[…]

5f1866f7-f6c6-43c9-83bb-07cbb51cc3a5 2021-06-11 10:34:12.893545 [DEBUG] switch_core_session.c:2815 sofia/lega/+FROM@W.X.Y.Z. skip receive message [APPLICATION_EXEC_COMPLETE] (channel is hungup already)

Is there any reason for this? SDP is not duplicated, but there is no specific reason for replying with 406.

Regards,

Igor.