Sip Reason header / Call completed elsewhere

Hello,
Do Digium phones (1_4_0_0) support CANCEL Sip Header ‘Call completed elsewhere’? Am I missing an obvious setting somewhere?

I have a Queue with a couple of phones, “Mark calls answered elsewhere” in the queue settings is checked.
Queue starts ringing everyone, one phone picks up,
PBX sends CANCEL to the other:

Reliably Transmitting (NAT) to xx.xx.xx.xx:1028:
CANCEL sip:[email protected]:1039;ob SIP/2.0
Via: SIP/2.0/UDP YY.YY.YY.YY:5060;branch=z9hG4bK679e6866;rport
Max-Forwards: 70
From: “EQ: Queue” sip:[email protected];tag=as5511de44
To: sip:[email protected]:1039;ob
Call-ID: [email protected]:5060
CSeq: 102 CANCEL
User-Agent: FPBX-2.11.0(11.6.0)
Reason: SIP;cause=200;text="Call completed elsewhere"
Content-Length: 0

To the phone if some one else picks up.
Phone gets it:

<— SIP read from UDP:xx.xx.xx.xx:1028 —>
SIP/2.0 200 OK
Via: SIP/2.0/UDP YY.YY.YY.YY:5060;rport=5060;received=YY.YY.YY.YY;branch=z9hG4bK679e6866
Call-ID: [email protected]:5060
From: “EQ: Queue” sip:[email protected];tag=as5511de44
To: sip:[email protected]:1039;ob;tag=p4qc-x0Pr4nYBnXng-JH7MIa.W8HpFAI
CSeq: 102 CANCEL
Content-Length: 0

<— SIP read from UDP:xx.xx.xx.xx:1028 —>
SIP/2.0 487 Request Terminated
Via: SIP/2.0/UDP YY.YY.YY.YY:5060;rport=5060;received=YY.YY.YY.YY;branch=z9hG4bK679e6866
Call-ID: [email protected]:5060
From: “EQ: Queue” sip:[email protected];tag=as5511de44
To: sip:[email protected]:1039;ob;tag=p4qc-x0Pr4nYBnXng-JH7MIa.W8HpFAI
CSeq: 102 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
User-Agent: Digium D70 1_4_0_0_57389
Content-Length: 0

But I still see a missed call notification on that phone.
Shouldn’t 200/“Call completed elsewhere” not show a missed call?

Negative, current firmwares do not support it.

Negative, current firmwares do not support it.