[SR-Users] Max-Forwards severly decreased when invite is relayed

[Grant Bagdasarian]

Hello,

Using Kamailio 4.1.

I'm having some problems with the Max-Forwards header being decremented by almost 50 when Kamailio relays the INVITE to the next hop.
The INVITE is received by Kamailio with the value of 65, but when sent to the next hop it has the value of 16.

I'm not altering the max-forwards header value in any way in the config script. At least not explicitly.
Are there any known constructs which indirectly affect the Max-Forwards header?

10.0.0.16 is the Kamailio server.

U 10.0.0.10:5060 -> 10.0.0.16:5060
INVITE sip:3110123456 at 10.0.0.16:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.0.0.10;rport;branch=z9hG4bKeg5g6U4Dc5HeS.
Max-Forwards: 65.
From: "31765123456" <sip:31765123456 at 10.0.0.10>;tag=9Z7avj87Bc2gm.
To: <sip:3110123456 at 10.0.0.16:5060>.
Call-ID: e089c971-f3a8-1231-c2bb-000c2941b070.
CSeq: 54291565 INVITE.
Contact: <sip:mod_sofia at 10.0.0.10:5060>.
User-Agent: CM Carrier SBC.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 205.

U 10.0.0.16:5060 -> 10.0.0.31:5060
INVITE sip:3110123456 at 10.0.0.25:5060 SIP/2.0.
Record-Route: <sip:10.0.0.16;lr=on>.
Via: SIP/2.0/UDP 10.0.0.16;branch=z9hG4bKe501.5459c149e5fa2c6c723149661017aa3d.0.
Via: SIP/2.0/UDP 10.0.0.10;rport=5060;branch=z9hG4bKeg5g6U4Dc5HeS.
Max-Forwards: 16.
From: "31765123456" <sip:31765123456 at 10.0.0.10>;tag=9Z7avj87Bc2gm.
To: <sip:3110123456 at 10.0.0.16:5060>.
Call-ID: e089c971-f3a8-1231-c2bb-000c2941b070.
CSeq: 54291565 INVITE.
Contact: <sip:mod_sofia at 10.0.0.10:5060>.
User-Agent: CM Carrier SBC.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, NOTIFY.
Supported: timer, precondition, path, replaces.
Allow-Events: talk, hold, conference, refer.
Content-Type: application/sdp.
Content-Disposition: session.
Content-Length: 205.
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