dns1.nextdns.io & dns2.nextdns.io IPv6 not resolving

Hi

I'm in Melbourne, Australia and ping.nextdns.io is giving me the following results.

It seems that the ultralow IPv6s are not resolving.

gsl-mel                   1 ms  (ultralow1)
vultr-mel                 2 ms  (anycast2, ultralow2)
vultr-mel (IPv6)          2 ms  (anycast2)
zetta-adl                10 ms
gsl-syd                  13 ms
zetta-syd (IPv6)         13 ms
vultr-syd                13 ms  (anycast1)
vultr-syd (IPv6)         13 ms  (anycast1)
zetta-bne                24 ms
zetta-syd                25 ms
anexia-bne (IPv6)        27 ms
anexia-bne               31 ms
anexia-per (IPv6)        38 ms
anexia-per               38 ms
zetta-per                39 ms
gsl-syd (IPv6)           error
zetta-per (IPv6)         error
dns1.nextdns.io (IPv6)   error  (ultralow1)
dns2.nextdns.io (IPv6)   error  (ultralow2)

 

I know IPv4 & IPv6 DNS is working correctly as I'm getting responses for A & AAAA

 

dig google.com.au A google.com.au AAAA +short
142.250.70.227
2404:6800:4015:803::2003

 

IPv4 dns1.nextdns.io = resolves correctly (via a CNAME)

 

dig dns1.nextdns.io A +short
dns1.steering.nextdns.io.
119.252.93.133

 

IPv4 dns2.nextdns.io = resolves correctly (via a CNAME)

 

dig dns2.nextdns.io A +short
dns2.steering.nextdns.io.
103.137.14.21

 

IPv6 dns1.nextdns.io = resolves to CNAME dns1.steering.nextdns.io

 

dig -6 dns1.nextdns.io AAAA +short
dns1.steering.nextdns.io.

 

Also checked with Cloudflare DNS

 

dig -6 dns1.nextdns.io AAAA +short @1.1.1.1
dns1.steering.nextdns.io.

 

Also checked with Google DNS

 

dig -6 dns1.nextdns.io AAAA +short @8.8.8.8
dns1.steering.nextdns.io.

 

Also checked with OpenDNS

 

dig -6 dns1.nextdns.io AAAA +short @208.67.222.222
dns1.steering.nextdns.io.

 

But IPv6 dns1.steering.nextdns.io AAAA = doesn't resolve

 

dig -6 dns1.steering.nextdns.io AAAA
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2477
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1220
;; QUESTION SECTION:
;dns1.steering.nextdns.io. IN AAAA

;; Query time: 54 msec
;; SERVER: XXXX:XXXX:XXXX::X#53(XXXX:XXXX:XXXX::X)
;; WHEN: Mon Jul 29 14:41:13 AEST 2024
;; MSG SIZE  rcvd: 53

 

IPv6 dns1.steering.nextdns.io AAAA with Cloudflare DNS = doesn't resolve

 

dig -6 dns1.steering.nextdns.io AAAA @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43437
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;dns1.steering.nextdns.io. IN AAAA

;; Query time: 56 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Mon Jul 29 14:40:13 AEST 2024
;; MSG SIZE  rcvd: 53

 

IPv6 dns1.steering.nextdns.io AAAA with Google DNS = doesn't resolve

 

dig -6 dns1.steering.nextdns.io AAAA @8.8.8.8

; <<>> DiG 9.10.6 <<>> dns1.steering.nextdns.io AAAA @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56780
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;dns1.steering.nextdns.io. IN AAAA

;; Query time: 49 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jul 29 14:45:35 AEST 2024
;; MSG SIZE  rcvd: 53

 

IPv6 dns1.steering.nextdns.io AAAA with OpenDNS = doesn't resolve

 

dig -6 dns1.steering.nextdns.io AAAA @208.67.222.222

; <<>> DiG 9.10.6 <<>> dns1.steering.nextdns.io AAAA @208.67.222.222
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21742
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1410
;; QUESTION SECTION:
;dns1.steering.nextdns.io. IN AAAA

;; Query time: 53 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Mon Jul 29 14:46:13 AEST 2024
;; MSG SIZE  rcvd: 53

 

Same results for dns2 variations of the above.

 

Any suggestions?