DNG OSLC selector url in Iframe is going into an infinite flickering loop

 We need to integrate DNG links into an external application. We have embedded the selector url for Requirements in an Iframe of the external application. The selector URL works when we are running both DNG and external application in the same server. However when the external application runs in a different host the selector delegated UI goes into an infinite flickering loop of page loads. I noticed that in case of running the applications(DNG and the external app) in same host, the JSESSIONID is getting passed in the request header and header "Sec-Fetch-Site: same-site" is set. When the hosts are different JSESSIONID is not getting passed and header "Sec-Fetch-Site: cross-site" is set.

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Connection: keep-alive
Host: xxxxxx4520:9443
Referer: https://xxxxxx8055/
sec-ch-ua: " Not;A Brand";v="99", "Google Chrome";v="91", "Chromium";v="91"
sec-ch-ua-mobile: ?0
Sec-Fetch-Dest: iframe
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: cross-site
Sec-Fetch-User: ?1
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,ta;q=0.8
Connection: keep-alive
Cookie: JazzFormAuth=Form; net-jazz-ajax-cookie-rememberUserId=; ASP.NET_SessionId=legwmrlennlocgdanfizc1cm; JSESSIONID=0000e0g5IEk6SriMj2lGCOdmd8h:caaab677-73c3-441d-9776-cd1ee7ece6c5; LtpaToken2=pt4ycwXvsUhV+BBvNBIiKOu1qe+wxZiU73kmk4zh3Xo4awNgc20ASECLNdBJQc/HkwW/rnPXbHbuenwfl8qUSrlQnKyVGWywukK9WJryR0j6TgA7Kxz3ga6eINrA7nd4r+MlJ2QAWQKaZ3FYMeLvx0Rp2PDonnEmWEB8GKSILagW/od9WDZM7c//Y27xecs2bCvtI51xeTMNw0vHZTveK7STWzOZ2w42xtjjcsinbAG26+1t1NUStt8g7WhiNvWvEygX4Yt+W2SH4HeyOzQK27q39xbmZbhy04LbFedDg9WxHyFDDTP67NPukF/1Nwir
Host: 172.xx.xx.xxx:9443
Referer: https://172.xx.xx.xxx/
sec-ch-ua: " Not;A Brand";v="99", "Microsoft Edge";v="91", "Chromium";v="91"
sec-ch-ua-mobile: ?0
Sec-Fetch-Dest: iframe
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-site
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Edg/91.0.864.54