Melbourne AU POP issues

Lots of DNS latency/failures yesterday and today here in Melbourne, VIC, Australia. From a basic DNS resolution perspective, 45.90.28.175 keeps dying while 45.90.28.175 continues to be able to resolve. Likewise, whatever's behind my DoQ and DoH hostnames (dns.nextdns.io) keeps dying too.

Output from diag:

Testing IPv6 connectivity
  available: false
Fetching https://test.nextdns.io
  status: ok
  client: 159.196.236.106
  protocol: UDP
  dest IP: 45.90.28.175
  server: gsl-mel-1
Fetching PoP name for ultra low latency primary IPv4 (ipv4.dns1.nextdns.io)
  gsl-mel: 8.832ms
Fetching PoP name for ultra low latency secondary IPv4 (ipv4.dns2.nextdns.io)
  gsl-adl: 15.643ms
Fetching PoP name for anycast primary IPv4 (45.90.28.0)
  gsl-mel: 8.788ms
Fetching PoP name for anycast secondary IPv4 (45.90.30.0)
  vultr-mel: 6.022ms
Pinging PoPs
  vultr-mel: 8.15ms
  gsl-mel: 8ms
  zetta-adl: 14.432ms
  zetta-syd: 18.109ms
  gsl-adl: 14.847ms
  gsl-syd: 17.657ms
  vultr-syd: 20.464ms
  gsl-bne: 30ms
  zetta-bne: 36.652ms
  gsl-per: 42.625ms
Traceroute for ultra low latency primary IPv4 (45.121.209.148)
    1       10.2.3.1    0ms   0ms   0ms
    2  159.196.236.1   18ms  14ms  15ms
    3   119.18.32.76   53ms  17ms  13ms
    4 159.196.252.25   14ms  13ms  12ms
    5  180.150.2.103   16ms  12ms  13ms
    6 103.137.13.247   10ms  18ms  13ms
    7 103.137.13.211   12ms  15ms  16ms
    8 45.121.209.254   13ms  13ms  14ms
    9 45.121.209.148   13ms  13ms  13ms
Traceroute for ultra low latency secondary IPv4 (116.90.72.196)
    1       10.2.3.1    0ms   0ms   0ms
    2  159.196.236.1   29ms   9ms  11ms
    3   119.18.32.76   11ms  16ms  15ms
    4 159.196.252.25    8ms  13ms  11ms
    5  180.150.2.103   11ms  13ms  11ms
    6 103.137.13.247   10ms  14ms  11ms
    7 103.137.13.211   12ms  13ms  11ms
    8 103.137.13.237   21ms  21ms  21ms
    9 100.127.240.103   20ms  22ms  20ms
   10  116.90.72.196   26ms  22ms  22ms
Traceroute for anycast primary IPv4 (45.90.28.0)