Comment by indianets

I had a similar issue with VoWiFi on my network due to EDNS, and it's rightly pointed out by msilverlock in forum.

  # dig vowifi.jio.com @1.1.1.1 A
  ;; ANSWER SECTION:
  vowifi.jio.com. 5 IN A 49.45.63.1
  vowifi.jio.com. 5 IN A 49.45.63.2
  ;; SERVER: 1.1.1.1#53(1.1.1.1)

  # dig vowifi.jio.com @8.8.8.8 A
  ;; ANSWER SECTION:
  vowifi.jio.com. 4 IN A 49.44.59.36
  vowifi.jio.com. 4 IN A 49.44.59.38
  ;; SERVER: 8.8.8.8#53(8.8.8.8)

https://community.cloudflare.com/t/vowifi-issues-due-to-poss...

As the article links to and says "privacy versus convenience", and I am happy that CloudFlare chose the former.