Hi all,
my FreePBX 16 with Asterisk 20 is experiencing a strange issue on receiving incoming calls directed queues. When tracing SIP messages, PBX tears down the call with BYE message “x-asterisk-hangupcause 16", Unrecognized SIP headers. Same calls are successfully received when routed to extension or ring group, but entering into queues breaks the call down. Older Asterisk versions, such as v16 did not thave the same issue. Driver is chan_sip. Please advise. Thanks in advance,
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