gfunkdave wrote:
... It will also make the router use itself as DNS server, which will let you use the router to refer to clients on the LAN by their local DNS name.
Thought this might be worth trying to see if it helps you. Here's the link to the thread with the full context of his post. His post is #6. https://community.ubnt.com/t5/EdgeMAX/How-to-Update-Public-DNS-Servers/td-p/1772996