[SR-Users] received parameter in route URI not used despite path use_received set to 1

[Easy Rider]

Hi

I'd like to make sure I've understood correctly how use_received in path
module is supposed to work, because I don't get what I expected to get
after reading the documentation
I've got a little set up with a UAC behind a NAT registering to a kamailio
registrar through a kamailio edge proxy (he UAC is a simple sipp script
simulating a UAC behind a NAT)
path is enabled on both EP and registrar, and use_received is set to 1 on EP

the path, contact and via headers in the REGISTER going from the EP to the
registrar are :

Via: SIP/2.0/UDP
192.168.26.129;branch=z9hG4bK20da.9f4ab6ad25eae6acdd4bd4d655b320ce.0
Via: SIP/2.0/UDP 10.0.0.5:6060
;received=192.168.26.1;rport=23456;branch=z9hG4bK-105-1-1
Contact: <sip:1000 at 10.0.0.5:6060>;methods="INVITE, ACK, BYE, CANCEL,
OPTIONS"
Path: <sip:inside at 192.168.26.129;lr;received=sip:192.168.26.1:23456>

where 192.168.26.129 is obviously the edge proxy

then I place a call to the UAC through registrar
the EP receiveds the following INVITE :

INVITE sip:1000 at 10.0.0.5:6060 SIP/2.0
Record-Route: <sip:192.168.26.142;lr>
Via: SIP/2.0/UDP
192.168.26.142;branch=z9hG4bKdf25.142eebc72e940d07ad983a858c67f64e.0
Route: <sip:inside at 192.168.26.129;lr;received=sip:192.168.26.1:23456>
Via: SIP/2.0/UDP 192.168.26.1:34567
;received=192.168.26.1;rport=34567;branch=z9hG4bK-107-1-1
From: "1001" <sip:1001 at my-fake-domain.com>;tag=107-1
To: <sip:1000 at my-fake-domain.com;user=phone>
CSeq: 1 INVITE
Call-ID: 1-107 at 192.168.26.1
Contact: <sip:1001 at 192.168.26.1:34567>
...

The Route header is exactly what is expected, but the edge proxy still
sends the request to the request-URI address (10.0.0.5:6060) instead of
sending the request to the received address set in the first Route header
The path module documentation states :
3.1. use_received (int)

If set to 1, the “received” parameter of the first Route URI is evaluated
and used as destination-URI if present.

kamailio configuration on the EP is almost the default one (just added path
support, and modified the REGISTRAR route to forward the request instead on
saving the contact, so there is not even a mid registrar on the EP

tried with kamailio 5.3.7 and 5.4.4

thanks
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