IssueTracker

I affirm that I have looked at all the other public issue templates at https://issuetracker.google.com/components/191657/manage#templates and restricted issue templates at https://issuetracker.google.com/components/191885/manage#templates and none of them apply.

[root@galaxy5 ~]# dig jimsampsonvw.ca ns @8.8.8.8

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.8 <<>> jimsampsonvw.ca ns @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11125
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;jimsampsonvw.ca.           IN      NS

;; ANSWER SECTION:
jimsampsonvw.ca.    21571   IN      NS      ns3.d2cmedia.ca.
jimsampsonvw.ca.    21571   IN      NS      ns1.d2cmedia.ca.

;; Query time: 52 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 06 11:06:33 EST 2022
;; MSG SIZE  rcvd: 89

[root@galaxy5 ~]# dig jimsampsonvw.ca @8.8.8.8

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.8 <<>> jimsampsonvw.ca @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17871
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;jimsampsonvw.ca.           IN      A

;; ANSWER SECTION:
jimsampsonvw.ca.    30      IN      A       38.102.73.139

;; Query time: 14 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 06 11:07:25 EST 2022
;; MSG SIZE  rcvd: 60

[root@galaxy5 ~]# dig www.jimsampsonvw.ca @8.8.8.8

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.8 <<>> www.jimsampsonvw.ca @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48090
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.jimsampsonvw.ca.               IN      A

;; ANSWER SECTION:
www.jimsampsonvw.ca.        374     IN      CNAME   d3kdaje6fbhqh.cloudfront.net.
d3kdaje6fbhqh.cloudfront.net. 60 IN A       54.192.51.47
d3kdaje6fbhqh.cloudfront.net. 60 IN A       54.192.51.4
d3kdaje6fbhqh.cloudfront.net. 60 IN A       54.192.51.104
d3kdaje6fbhqh.cloudfront.net. 60 IN A       54.192.51.78

;; Query time: 45 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 06 11:08:11 EST 2022
;; MSG SIZE  rcvd: 154

[root@galaxy5 ~]# dig www.jimsampsonvw.ca @ns1.d2cmedia.ca

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.8 <<>> www.jimsampsonvw.ca @ns1.d2cmedia.ca
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35702
;; flags: qr aa rd ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.jimsampsonvw.ca.               IN      A

;; ANSWER SECTION:
www.jimsampsonvw.ca.        30      IN      A       38.102.73.139

;; Query time: 10 msec
;; SERVER: 66.171.161.20#53(66.171.161.20)
;; WHEN: Tue Dec 06 11:09:39 EST 2022
;; MSG SIZE  rcvd: 64

So your caching resolver updates its zone cache almost immediately when a change is done to the zone, but it doesn't update the recursive cache for the www since that used to be a cname to a different zone which was not updated.