NextDNS stamp not working with Ubiquiti router

Hi,

I recently bought a Unifi router and am trying to configure DNS routing directly onto it. I took the DNS stamp for DNSCrypt straight from the setup guide and put it into my router's DNS settings:

 Unfortunately, when I disable the NextDNS app on my computer, NextDNS doesn't see that I'm filtering DNS queries through it:

 It works fine when I have the app open, but obviously that means it's not working on the router level. Not really sure where I'm going wrong. I've even used DNSCrypt's stamp generator and have gotten the same issue.