Please check your nginx config: I guess the file /etc/nginx/sites-enabled/my.domain.conf does not actually listen on port 443? Instead, there is another nginx config listening to the TCP stream on 443 and uses ALPN multiplexing to route the traffic either to upstream web or upstream turn?
As far as I understand the problem is that the module “ngx_stream_realip_module” is not compiled in Nginx by default.
So you will have to manually compile Nginx to get this module activated. http://nginx.org/en/docs/stream/ngx_stream_realip_module.html