Google Public DNS gives away A-records of domains with DNS hosting on nic.ru every other time

Question

Google

Since the beginning of the week, I have been observing oddities with Google's public DNS servers. They give away A-records of domains that use DNS hosting services from nic.ru every other time. I tried to write to them (nic.ru) in support, but since I am not the owner of these domains, apparently they simply ignored me and did not answer.
Nobody knows what's wrong?

Answer 1

Yes, I suppose again the techies of the rucenter twisted the limits, like a six for technical inspection. This already happened immediately after the transition of the DNS rucenter to a new platform.

Answer 2

All servers have a public DNS from Google. The problem was discovered when users began to complain that mail to partners did not go away. I checked - everyone with whom there are problems - DNS hosting on nic.ru.

Answer 3

If you use 4.2.2.x and 77.88.8.8 with Google, does the problem persist?
What error code does Google return?