Cookie value is not updated when cookie already exists during auth negotiation

As we hit the authenticate Uri, I think it ask for cookie and redirect to /my.policy with cookie and then during negotiation the HttpResponse ask to Set-Cookie with same name but updated value. I am not sure if this is an issue or something needs to be configured.

Following is the communication between Android and APIs

Request 1:

GET https://websiteUrl/authenticate HTTP/1.1
Accept-Charset: utf-8
Accept-Encoding: gzip, deflate
User-Agent: nintex-mobile-ap
Accept-Language: en-AU
NM_ETag: 783e6a83-670e-4b56-81eb-7584609ad0c0
NM_LastModified: 1970-01-01T10:00:00.0000000+10:00
Host: connectuat.snclavalinom.com
Connection: Keep-Alive

Response 1:

HTTP/1.0 302 Found
Server: BigIP
Connection: Close
Content-Length: 0
Location: /my.policy
Set-Cookie: LastMRH_Session=29c62c5b;path=/;secure
Set-Cookie: MRHSession=22afd2631f7031af58bbc09829c62c5b;path=/;secure
Set-Cookie: MRHSHint=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/

Request 2:

GET https://websiteUrl/my.policy HTTP/1.1
Accept-Charset: utf-8
Accept-Encoding: gzip, deflate
User-Agent: nintex-mobile-ap
Accept-Language: en-AU
NM_ETag: 783e6a83-670e-4b56-81eb-7584609ad0c0
NM_LastModified: 1970-01-01T10:00:00.0000000+10:00
Host: connectuat.snclavalinom.com
Connection: Keep-Alive
Cookie: LastMRH_Session=29c62c5b; MRHSession=22afd2631f7031af58bbc09829c62c5b
Cookie2: $Version=1

Response 2:

HTTP/1.1 401 Unauthorized
Server: Apache
Content-Type: text/html; charset=utf-8
X-Frame-Options: DENY
Pragma: no-cache
Cache-Control: no-cache, must-revalidate
Accept-Ranges: bytes
Connection: close
Date: Thu, 17 Dec 2015 22:16:06 GMT
Age: 5938
Content-Length: 304
WWW-Authenticate: Basic realm=""
Set-Cookie: LastMRH_Session=29c62c5b;path=/;secure
Set-Cookie: MRHSession=f755cbe45e1b00fd8edfd41629c62c5b;path=/;secure

Request 3:

GET https://websiteUrl/my.policy HTTP/1.1
Accept-Charset: utf-8
Accept-Encoding: gzip, deflate
User-Agent: nintex-mobile-ap
Accept-Language: en-AU
NM_ETag: 783e6a83-670e-4b56-81eb-7584609ad0c0
NM_LastModified: 1970-01-01T10:00:00.0000000+10:00
Host: connectuat.snclavalinom.com
Connection: Keep-Alive
Cookie: LastMRH_Session=29c62c5b; MRHSession=22afd2631f7031af58bbc09829c62c5b
Cookie2: $Version=1
Authorization: Basic <removed intentionality>

Response 3:

HTTP/1.0 302 Found
Server: BigIP
Connection: Close
Content-Length: 0
Location: /my.logout.php3?errorcode=20
Set-Cookie: LastMRH_Session=29c62c5b;path=/;secure
Set-Cookie: MRHSession=22afd2631f7031af58bbc09829c62c5b;path=/;secure

This is working fine on iOS because the value of MRHSession is being updated.