Hi 

dialog timeout is occurred if 200 ok having mixed loose and strict routing entries in record route header   

conf file attached 

INVITE sip:123456789@22.22.22.22:5060 SIP/2.0
Via: SIP/2.0/UDP 176.204.26.157:63939;rport;branch=z9hG4bKPjvAKLQD72G88kpqC2IJwbmTcXUlHGULcW
Max-Forwards: 70
From: sip:123455555@22.22.22.22;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: sip:123456789@22.22.22.22
Contact: <sip:123455555@176.204.26.157:63939;ob>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14602 INVITE
Route: <sip:11.11.11.11:345;lr>
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: zeo-iphone
Opcode: 19815
Content-Type: application/sdp
Content-Length:   320

v=0
o=- 3653999880 3653999880 IN IP4 10.220.83.191
s=pjmedia
b=AS:25
t=0 0
a=X-nat:0
m=audio 4000 RTP/AVP 18 96
c=IN IP4 10.220.83.191
b=TIAS:8000
a=rtcp:4001 IN IP4 10.123.11.223
a=sendrecv
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=X-adapter:some value

SIP/2.0 407 Proxy Authentication required
Via: SIP/2.0/UDP 11.11.11.11:345;branch=z9hG4bK3d4f.6f8dff1ec0806cb23f56d847d5fe3934.0,SIP/2.0/UDP 176.204.26.157:63939;rport=63939;branch=z9hG4bKPjvAKLQD72G88kpqC2IJwbmTcXUlHGULcW;received=176.204.26.157
From: <sip:123455555@22.22.22.22>;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: <sip:123456789@22.22.22.22>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14602 INVITE
Proxy-Authenticate: Digest nonce="6b24dc6996de20028c78dbeaf13edc55",realm="22.22.22.22",opaque="",stale=FALSE,algorithm=MD5
Content-Length: 0


ACK sip:123456789@22.22.22.22:5060 SIP/2.0
Via: SIP/2.0/UDP 176.204.26.157:63939;rport;branch=z9hG4bKPjvAKLQD72G88kpqC2IJwbmTcXUlHGULcW
Max-Forwards: 70
From: sip:123455555@22.22.22.22;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: sip:123456789@22.22.22.22
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14602 ACK
Route: <sip:11.11.11.11:345;lr>
Content-Length:  0


INVITE sip:123456789@22.22.22.22:5060 SIP/2.0
Via: SIP/2.0/UDP 176.204.26.157:63939;rport;branch=z9hG4bKPjmWCyQQWaKBZC0fGKfS2LCXCIklN-UIHI
Max-Forwards: 70
From: sip:123455555@22.22.22.22;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: sip:123456789@22.22.22.22
Contact: <sip:123455555@176.204.26.157:63939;ob>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14603 INVITE
Route: <sip:11.11.11.11:345;lr>
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: zeo-iphone
Opcode: 19815
Proxy-Authorization: Digest username="123455555", realm="22.22.22.22", nonce="6b24dc6996de20028c78dbeaf13edc55", uri="sip:123456789@22.22.22.22:5060", response="554a1da255084f7a95d3b6e7a0c48933", algorithm=MD5
Content-Type: application/sdp
Content-Length:   320

v=0
o=- 3653999880 3653999880 IN IP4 10.220.83.191
s=pjmedia
b=AS:25
t=0 0
a=X-nat:0
m=audio 4000 RTP/AVP 18 96
c=IN IP4 10.220.83.191
b=TIAS:8000
a=rtcp:4001 IN IP4 34.220.83.191
a=sendrecv
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=X-adapter:some value

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 11.11.11.11:345;branch=z9hG4bK4d4f.b793c28bbb6684da0ad60d4320be2d6b.0,SIP/2.0/UDP 176.204.26.157:63939;rport=63939;branch=z9hG4bKPjmWCyQQWaKBZC0fGKfS2LCXCIklN-UIHI;received=176.204.26.157
From: <sip:123455555@22.22.22.22>;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: <sip:123456789@22.22.22.22>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14603 INVITE
Content-Length: 0


SIP/2.0 183 Session progress
Via: SIP/2.0/UDP 11.11.11.11:345;branch=z9hG4bK4d4f.b793c28bbb6684da0ad60d4320be2d6b.0,SIP/2.0/UDP 176.204.26.157:63939;rport=63939;branch=z9hG4bKPjmWCyQQWaKBZC0fGKfS2LCXCIklN-UIHI;received=176.204.26.157
From: <sip:123455555@22.22.22.22>;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: <sip:123456789@22.22.22.22>;tag=GB-1445011078679
CSeq: 14603 INVITE
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
Contact: <sip:22.22.22.22:5060>
Content-Type: application/sdp
Record-Route: <sip:22.22.22.22:5060;lr>,<sip:11.11.11.11:345;lr>
Content-Length: 298

v=0
o=- 3653999880 3653999880 IN IP4 50.56.154.204
s=zeodialer
c=IN IP4 50.33.154.204
b=AS:25
t=0 0
m=audio 53128 RTP/AVP 18 96
c=IN IP4 50.33.154.204
b=TIAS:8000
a=rtpmap:18 G729/8000
a=sendrecv
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=X-adapter:some value

SIP/2.0 183 Session Progress
Record-Route: <sip:22.22.22.22:5060;lr>,<sip:11.11.11.11:345>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14603 INVITE
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,INFO,PRACK,NOTIFY,MESSAGE,UPDATE
P-Early-Media: sendrecv
Contact: <sip:22.22.22.22:5060>
Via: SIP/2.0/UDP 11.11.11.11:345;branch=z9hG4bK4d4f.b793c28bbb6684da0ad60d4320be2d6b.0,SIP/2.0/UDP 176.204.26.157:63939;rport=63939;branch=z9hG4bKPjmWCyQQWaKBZC0fGKfS2LCXCIklN-UIHI;received=176.204.26.157
To: <sip:123456789@22.22.22.22>;tag=GB-1445011078679
Content-Type: application/sdp
From: <sip:123455555@22.22.22.22>;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
Content-Length: 212

v=0
o=- 1426744035 1426744035 IN IP4 50.56.154.204
s=Nexge
c=IN IP4 50.22.154.204
t=0 0
m=audio 53128 RTP/AVP 18 96
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=ptime:20

SIP/2.0 200 OK
Record-Route: <sip:22.22.22.22:5060;lr>,<sip:11.11.11.11:345>
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14603 INVITE
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,INFO,PRACK,NOTIFY,MESSAGE,UPDATE
Contact: <sip:22.22.22.22:5060>
Via: SIP/2.0/UDP 11.11.11.11:345;branch=z9hG4bK4d4f.b793c28bbb6684da0ad60d4320be2d6b.0,SIP/2.0/UDP 176.204.26.157:63939;rport=63939;branch=z9hG4bKPjmWCyQQWaKBZC0fGKfS2LCXCIklN-UIHI;received=176.204.26.157
To: <sip:123456789@22.22.22.22>;tag=GB-1445011078679
Content-Type: application/sdp
From: <sip:123455555@22.22.22.22>;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
Content-Length: 212

v=0
o=- 1426744035 1426744035 IN IP4 50.56.154.204
s=Nexge
c=IN IP4 50.33.44.204
t=0 0
m=audio 53128 RTP/AVP 18 96
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=ptime:20

ACK sip:11.11.11.11:345 SIP/2.0
Via: SIP/2.0/UDP 176.204.26.157:63939;rport;branch=z9hG4bKPjldbprXw3ybGOxoeKWwvtdxLmNp8jXsOX
Max-Forwards: 70
From: sip:123455555@22.22.22.22;tag=E9YwhssbjdD63KZpXep-UCmOxshWrcwu
To: sip:123456789@22.22.22.22;tag=GB-1445011078679
Call-ID: VlaYDWuM5COSfEIqydwAxFM76TLv7Syh
CSeq: 14603 ACK
Route: <sip:22.22.22.22:5060;lr>
Route: <sip:22.22.22.22:5060>
Content-Length:  0