NextDNS Router Config resolving rouge DNS

Hi there,

I am using the NextDNS EdgeOS router configuration (https://github.com/nextdns/nextdns/wiki/EdgeOS). I am seeing a strange yet worrying issue with some dns resolution of domains.

Essentially, when NextDNS is set up, it will resolve a number of domains to two AWS IP addresses. These domains include:
dokuwiki

bitwarden

front

freshrss

pihole

And many others. In fact, most English words seem to resolve to the two AWS IPs

They seem to resolve to these two AWS IP's:

3.20.137.44

3.141.96.53

When I uninstall NextDNS from my router, the issue goes away. Ive removed the conf files, and started with a fresh installation. Same issue. 

I have no rewrite that would be causing this issue, nor do I have any custom block page. 

Apart from the potential security risk this may pose, does anyone else have this issue?