The session ID keeps getting reset.

Version : 2023.09.11.1010

This is my Nginx configuration.
What's wrong with it?

user  nginx;
pid /run/nginx.pid;

worker_processes 2;
worker_rlimit_nofile 100000;

error_log /var/log/nginx/error.log crit;

events {
    worker_connections 4000;
    use epoll;
    multi_accept on;
    accept_mutex off;
}

http {
    log_format main_logs '$remote_addr - $remote_user [$time_local] "$request" '
                          '$status $body_bytes_sent "$http_referer" '
                          '"$http_user_agent" "$http_x_forwarded_for" '
                          '$request_time $upstream_response_time $pipe $upstream_cache_status';

	include /etc/nginx/mime.types;
	default_type application/octet-stream;

    access_log /dev/stdout main_logs;

    server_tokens off;
    sendfile on;
    tcp_nopush on;
    gzip on;
    keepalive_timeout 65;
    include /etc/nginx/conf.d/*.conf;
}

# remotely
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

server {
    listen 80 default_server;
    server_name localhost;

    keepalive_timeout 180s;
    proxy_read_timeout 120s;

    location / {
        proxy_pass http://remotely.service:5000;
        proxy_http_version 1.1;
        proxy_set_header   Upgrade $http_upgrade;
        proxy_set_header   Connection keep-alive;
        proxy_set_header   Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_set_header   X-Forwarded-Host $host;
        proxy_send_timeout 30m;
        proxy_connect_timeout 3600s;
        proxy_read_timeout 30m;
        client_max_body_size 10M;
    }

    location /_blazor {
        proxy_pass http://remotely.service:5000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_set_header   X-Forwarded-Host $host;
        proxy_send_timeout 30m;
        proxy_connect_timeout 3600s;
        proxy_read_timeout 30m;
        client_max_body_size 10M;
    }
    location /AgentHub {
        proxy_pass   http://remotely.service:5000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_set_header   X-Forwarded-Host $host;
        proxy_send_timeout 30m;
        proxy_connect_timeout 3600s;
        proxy_read_timeout 30m;
        client_max_body_size 10M;
    }
    location /ViewerHub {
        proxy_pass   http://remotely.service:5000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_set_header   X-Forwarded-Host $host;
        proxy_send_timeout 30m;
        proxy_connect_timeout 3600s;
        proxy_read_timeout 30m;
        client_max_body_size 10M;
    }
    location /CasterHub {
        proxy_pass   http://remotely.service:5000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
        proxy_set_header   X-Forwarded-Host $host;
        proxy_send_timeout 30m;
        proxy_connect_timeout 3600s;
        proxy_read_timeout 30m;
        client_max_body_size 10M;
    }
}

I followed the Nginx configuration on GitHub as closely as possible, but I'm encountering an issue where the session ID frequently refreshes.

Start with the posted Nginx configuration and the project's Blazor/SignalR connection setup. Compare the proxy handling for normal and hub requests, then reproduce the session refresh and identify which request loses the session ID. Done means the session ID remains stable through the affected workflow.