1.1.1.1 and 1.0.0.1 SERVFAIL for alink.co.za (8.8.8.8 works fine)

Cloudflare 1.1.1.1 / 1.0.0.1 does not find my domain (alink.co.za) also hosted on CF.

  1. id.server for both is is “SYD”
  2. lookups succeed on 8.8.8.8 and 9.9.9.9

; <<>> DiG 9.16.1-Ubuntu <<>> ns alink.co.za @ 1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 23681
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; OPT=15: 00 06 ("…")
;; QUESTION SECTION:
;alink.co.za. IN NS

;; Query time: 15 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Mon Apr 12 22:17:23 AEST 2021
;; MSG SIZE rcvd: 46

[email protected]:/var/log/apache2# dig ns alink.co.za @ 1.0.0.1

; <<>> DiG 9.16.1-Ubuntu <<>> ns alink.co.za @ 1.0.0.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 55458
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; OPT=15: 00 06 ("…")
;; QUESTION SECTION:
;alink.co.za. IN NS

;; Query time: 15 msec
;; SERVER: 1.0.0.1#53(1.0.0.1)
;; WHEN: Mon Apr 12 22:17:29 AEST 2021
;; MSG SIZE rcvd: 46

[email protected]:/var/log/apache2# dig ns alink.co.za @ 9.9.9.9

; <<>> DiG 9.16.1-Ubuntu <<>> ns alink.co.za @ 9.9.9.9
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14872
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;alink.co.za. IN NS

;; ANSWER SECTION:
alink.co.za. 43200 IN NS dave.ns.cloudflare.com.
alink.co.za. 43200 IN NS kristin.ns.cloudflare.com.

;; Query time: 631 msec
;; SERVER: 9.9.9.9#53(9.9.9.9)
;; WHEN: Mon Apr 12 22:17:46 AEST 2021
;; MSG SIZE rcvd: 98

Thanks!