DNS Configuration - Can't ping deployed hosts from MAAS server

I inherited a MAAS environment which I am still learning via trial and error and I have since upgraded to the latest 2.7 on Ubuntu 18.04. From the MAAS server, I can’t ping the deployed hosts names out of the box. I can see all the DNS A records are created successfully from the DNS UI Page (DNS> Click on Domain> see resource records). If I do an nslookup <deployed.hostname> I get no results. Only when I change the nslookup dns server to – nslookup <deployed.hostname> – does it appear. I think the issue is with Bind9 or resolvconf, but I don’t know how to fix it.

Any ideas?