Trouble with Relay Mode and NextDNS CLI: Need Help!

Friends, I'm playing around with the relay mode and authenticated my PPPoE internet on my router. I activated the relay mode on the "wan6" and "guest" interfaces. However, I use NextDNS CLI on both the lan and guest interfaces. Unfortunately, when I activated the relay mode on the "guest" interface, it overrode the NextDNS DNS settings.

The question is: How can I use relay mode and NextDNS CLI together?

Guys? Any?