Thanks for your response @KDSys

1. I tried the Chrome Dev Tools method you suggested. I see a huge number of requests being made to my website 2 - https://bignumworks.com

2. Here is my config file for website 2. Which lines should I remove?

server {

    root /var/www/bignumworks.com/html;
    index index.html index.htm index.nginx-debian.html;

    server_name bignumworks.com www.bignumworks.com;

    location / {
        try_files $uri $uri/ =404;
    }

    listen [::]:443 ssl; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/bignumworks.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/bignumworks.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
    if ($host = www.bignumworks.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = bignumworks.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;

    server_name bignumworks.com www.bignumworks.com;
    return 404; # managed by Certbot
}