Default_https.conf overwrite with Nginx SSL termination Varnish

Hi, I have had a developer implement varnish with SSL termination on our cpanel server. Everything works fine except every so often our default_https.conf file keeps getting overwritten in /etc/nginx/conf.d I think the only changes made in this file is our domain name has been commented out ( # www.domain.com) see below # Definition block for domain(s): domain.com mail.domain.com www.domain.com webmail.domain.com cpanel.domain.com webdisk.domain.com # server { listen 443 ssl http2; #listen [::]:443 ssl http2 ipv6only=off; server_name domain.com mail.domain.com # www.domain.com webmail.domain.com cpanel.domain.com webdisk.domain.com; # deny all; # DO NOT REMOVE OR CHANGE THIS LINE - Used when Engintron is disabled to block Nginx from becoming an open proxy ssl_certificate /var/cpanel/ssl/apache_tls/domain.com/combined; ssl_certificate_key /var/cpanel/ssl/apache_tls/domain.com/combined; include common_https.conf; }
I have asked our developer to resolve this as every time this file is overwritten our varnish is disabled. Creating performance issues, but I have not heard back. I am not hugely experienced with server admin but can find my way around. I was hoping someone could help with advising how I can make these changes permanent. Thanks