error while parsing credentials

Hello,

We have one particular device which won't authenticate with Kamailio, and
are looking for any insight into why. When Kamailio receives the REGISTER
it logs:

Nov 17 17:50:37 sip /sbin/kamailio[2293367]: ERROR: {1 2 REGISTER
mrXSmu5Gh} <core> [core/parser/digest/digest.c:323]: find_credentials():
error while parsing credentials
Nov 17 17:50:37 sip /sbin/kamailio[2293367]: ERROR: {1 2 REGISTER
mrXSmu5Gh} auth [api.c:73]: pre_auth(): Error while looking for credentials

A redacted copy of the REGISTER is below. I note two unusual things:
- On the Authorization header it says "[truncated]Authorization".
- It includes a "cnonce" (client nonce) in the Authorization data, which is
unusual compared to our other SIP devices.
Thanks in advance!

Session Initiation Protocol (REGISTER)
    Request-Line: REGISTER sip:sip.example.com:5060 SIP/2.0
    Message Header
        To: "C25" <sip:[email protected]>
            SIP to display info: "C25"
            SIP to address: sip:[email protected]
                SIP to address User Part: 123456789
                SIP to address Host Part: sip.example.com
        From: "C25" <sip:[email protected]>;tag=mmVG392Qv
            SIP from display info: "C25"
            SIP from address: sip:[email protected]
            SIP from tag: mmVG392Qv
        Contact: <sip:[email protected]:65477;transport=udp>
            Contact URI: sip:[email protected]:65477;transport=udp
        Via: SIP/2.0/UDP 11.22.221.114:65477;branch=z9hG4bK.X0v8d63yc
        CSeq: 2 REGISTER
        Call-ID: iYC5fcJqy
        [Generated Call-ID: iYC5fcJqy]
        Max-Forwards: 70
        Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, NOTIFY
        User-Agent: Rogue sip 7.1.11 (stm32mp15-ya157c-v2) linux
        Expires: 3600
         [truncated]Authorization: Digest realm="sip.example.com",
nonce="aRvGYGkbxTQrS5pTzBoahdefo1xCqskN", algorithm=MD5,
username="123456789", uri="sip:sip.example.com:5060",
response="ab717ce439c666e9b5651d0dc74dff9a", cnonce="MzrTCxYCoCPxZ
            Authentication Scheme: Digest
            Realm: "sip.example.com"
            Nonce Value: "aRvGYGkbxTQrS5pTzBoahdefo1xCqskN"
            Algorithm: MD5
            Username: "123456789"
            Authentication URI: "sip:sip.example.com:5060"
            Digest Authentication Response:
"ab717ce439c666e9b5651d0dc74dff9a"
            CNonce Value: "MzrTCxYCoCPxZ91a"
            Nonce Count: 00000001
            QOP:
        Content-Length: 0

-- 
David Cunningham, Voisonics Limited
http://voisonics.com/
USA: +1 213 221 1092
New Zealand: +64 (0)28 2558 3782

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