Why does NSLookup provides DNS resolution but also says "No answer"?

Question

When I performed a nslookup in a Pod within my k8s cluster for a Service name I get the following result:

Server:         172.20.0.10
Address:        172.20.0.10:53
 
Name:   app.one.svc.cluster.local
Address: 172.20.40.30
 
*** Can't find app.one.svc.cluster.local: No answer

The IP returned 172.20.40.30 is correct but it still says:

*** Can't find app.one.svc.cluster.local: No answer

I was expecting it to return the IP as it did but not to also get a No Answer response.

I didn't get a chance to test with dig, getent etc. and the issue is unfortunately no longer reproducible at this stage.