caching does not seem to be working for internal view

[Robert Moskowitz]

Part of my problem is that caching does not seem to be working in my 
internal view.

Something is happening such that my internal systems AND the server 
itself cannot resolve names and looses it even 5 min later, indicating 
not caching.

I read https://kb.isc.org/docs/aa-00851

In my include for the internal view (named.internal) I have:

     match-clients        { httnets; };
     match-destinations    { httnets; };
     allow-query        { httnets; };
     allow-query-cache    { httnets; };
     allow-recursion        { any; };
     recursion yes;
     empty-zones-enable yes;

Yet I get on my DNS server:

ping www.google.com
ping: www.google.com: Name or service not known

Then later it works.

Then later it doesn't again.

Sigh.  If at least caching was working for internal use, I would be able 
to work more smoothy?