nginx windows load balancing very slow for single request

I have been using nginx with load balancing for request forwarding purpose, each incoming request will be forwarded to ip/domain defined in upstream, below is my configuration :

    worker_processes  1;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream; 
    log_format post_logs escape=none '[$time_local] $realip_remote_addr "$request" $status '  

                        '$body_bytes_sent "$http_referer" '        

                     ' \n[$request_body]';

    access_log  logs/post.log  post_logs;   
    upstream backend
    {
        server 1.1.1.1:8080;
        server 2.2.2.2:8080;    
    }   
    sendfile        on;       
    keepalive_timeout  65;
    
     server {
        listen       8005 ssl;
        listen       localhost:8005 ssl;        
        server_name  localhost;
        more_set_headers 'Server: ABC';
        
        ssl_protocols TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_ciphers "EECDH+AESGCM,EDH+AESGCM";      
        ssl_certificate /logs/ssl/ssl.crt; 
        ssl_certificate_key /logs/ssl/key.key; 
            
        client_body_buffer_size  1k;
        client_header_buffer_size 1k;
        client_max_body_size 1m; #handles request size
        large_client_header_buffers 2 1k;

            
        location /wapp/ {
        
            autoindex off;          
            limit_except POST {
               deny all;
            }           
            proxy_pass      https://backend/abc/xyz;            
            proxy_read_timeout 300;         
            proxy_pass_header Server;
            proxy_set_header          Host            $host;
            proxy_set_header          X-Real-IP       $remote_addr;
            proxy_set_header          X-Forwarded-For $proxy_add_x_forwarded_for;
            add_header  X-Frame-Options "SAMEORIGIN" always;
            more_set_headers 'Server: ABC';         
        }       
    }   
}

currently there is no other traffic on this configuration i am only sending single request, When i am directly sending traffic on 1.1.1.1:8080 or 2.2.2.2:8080 with

proxy_pass      https://1.1.1.1:8080/abc/xyz;

or

proxy_pass      https://2.2.2.2:8080/abc/xyz;

i am getting response within second, but when i am trying with upstream configuration, i am getting response at around 2 minutes, check postman screen shot below for same

why with upstream configuration it is taking more than enough time for single request only ? can any one help ?

adding upstream logs here :

client=::1 
method=POST 
request="POST /wapp/ HTTP/1.1" 
request_length=1410 status=200 
bytes_sent=5289 
body_bytes_sent=5128 
referer= user_agent="PostmanRuntime/7.29.2" 
upstream_addr=1.1.1.1:8080
upstream_status=200 
request_time=107.998 
upstream_response_time=107.998 
upstream_connect_time=0.036 
upstream_header_time=107.997