Duckdns.org not working properly the last 24 hours

One of their authoritative name servers (ns1.duckdns.org) is serving old information. As a result, about 1/3 of queries are resolved to a wrong ip.

`drill @ns1.duckdns.org pet-trans.duckdns.org`

`drill @ns2.duckdns.org pet-trans.duckdns.org`