Meross IoT Devices

I am new to NextDNS and have set it up on my Deco Router last night. This morning all of my IoT devices from Meross were off line. I have checked the logs and I can find any blocks. I changed the DNS back to 1.1.1.1 and all of my devices came online. I have all of the defaults under Settings. Any help would be great. Thank you.