Just set up a load balancer to one of my CF regions, but I'm getting
CNAME Cross-User Banned
CNAME Cross-User Banned
when calling the subdomain now. I'm using a proxied load balancer, and the setup looks all good to me. The LB also shows up in CF DNS records just fine.
Its a pretty new domain (got it a few days ago), but another subdomain with a worker bound to it works just fine. The subdomain I use for the LB was not used before.