Trouble looking up dacspro.com

[Fr34k]

Hello,

Having trouble looking up dacspro.com.

This domain has three NS servers, one of which is not responding (ns02) to my queries.


dacspro.com.            172800  IN      NS      ns01.gnenc.org.
dacspro.com.            172800  IN      NS      ns02.gnenc.org.
dacspro.com.            172800  IN      NS      ns03.gnenc.org.


That's okay because the others are responding.

However, 9.8.1-P1 seems like it was not trying the other working NS servers until after I ran rndc flushname.

Either may understanding on how this should work is flawed, some other force is at work, or something else.


What am I missing?

Thanks.