I updated nginx to version 1.13.0

This rule that was working correctly right now makes me mistake in the browser: ERR_TOO_MANY_REDIRECTS

if ($host ~* ^(.*)\.website\.com$) {

set $sub_domain $1;
rewrite ^/(.*)?$ /index.cfm?event=dashboard&lista=$sub_domain&nuovoURL=$1 last;

}


Thank you in advance for your help!