Not auto connecting to ultra low servers

Hi, I use the NextDNS CLI on my M1 Mac. For the past 2 days am getting connected to Singapore DNS Servers instead of the nearest ultra low latency servers.

Output of ping.nextdns.io

  gc-bom                   40 ms  (ultralow1)
  ls-bom (IPv6)            40 ms
  do-blr (IPv6)            51 ms
  ls-bom                   51 ms  (ultralow2)
  do-blr                   56 ms
  anexia-maa               60 ms
  serverwala-del           66 ms
  microhost-del            66 ms
  anexia-maa (IPv6)        70 ms
  zepto-sin (IPv6)         87 ms  (anycast1)
■ zepto-sin               100 ms  (anycast1)
  anexia-ams (IPv6)       151 ms  (anycast2)
  anexia-ams              169 ms  (anycast2)
  premiumrdp-ruh          195 ms
  navico-ruh              251 ms
  edis-dxb                252 ms
  edis-dxb (IPv6)         274 ms
  anexia-dxb              286 ms
  anexia-dxb (IPv6)       304 ms
  dns1.nextdns.io (IPv6)   error  (ultralow1)
  dns2.nextdns.io (IPv6)   error  (ultralow2)

Output of test.nextdns.io

{
"status": "ok",
"protocol": "DOH",
"configuration": "fp3fb16b56090b4e92",
"client": "redacted",
"destIP": "45.90.28.0",
"anycast": true,
"server": "zepto-sin-1",
"clientName": "nextdns-cli",
"deviceName": "Gaurav’s MacBook Air",
"deviceID": "79A86"
}

Output of diag tool

Welcome to NextDNS network diagnostic tool.

This tool will download a small binary to capture latency and routing information
regarding the connectivity of your network with NextDNS. In order to perform a
traceroute, root permission is required. You may therefore be asked to provide
your password for sudo.

The source code of this tool is available at https://github.com/nextdns/diag

Do you want to continue? (press enter to accept)
/tmp/nextdns-diag-1172: line 1: Not: command not found

I am unable to run the diag tool, are there any workarounds or some other info required from my end please reply. 

Device Details: MacBook Air M1 2020

OS: Big Sur 11.3

NextDNS Version: 1.32.1 of the CLI (installed via brew)