UDM : loosed local resolution

I've setup NextDNS with the script on guide for Unifi Router.

All is ok but i loosed local resolution on the router. So funtions like speed test, updates and teleport with remote access are KO.

To fix it, i've added DNS ip in /etc/resolv.conf. But when an update of nextdns is availaible, this file is updated with only 127.0.0.1 ip and i loose local reolution again.

How ti fix this please ?