Hi,
Thanks for posting here.
May I confirm with you if the preferred DNS server was configured as 192.168.222.128 and the alternative DNS server was configured as 192.168.222.3 on client?
If yes, please kindly note that NSLOOKUP tool will only query the first DNS server on Windows System even if the preferred DNS server is offline; While windows system will actually query for the secondary DNS server when the preferred DNS server is down with Dnsapi.
So, do not use NSLOOKUP command to test preferred DNS and Alternative DNS server, you may use ping command.
I did some test in my environment and here is the result for your reference (11.11.11.11 is an invalid IP address).
Hope my answer will help you. Thanks!
---Please remember to Accept as answer if the reply is helpful---
Best Regards,
Sunny