I just set up a new Deco M5 mesh system and have discovered an annoying issue.  I have a couple of devices (a Ring Doorbell, and a smart Water Heater) that are constantly reported as "offline" in the Deco app (and even trigger disconnect/connect notifications) but when I check them on their respective apps they are connected and even transmitting data.

 I have tried disabling "Mesh Technology" for these devices and even went as far as to set up IP address reservations for the devices but nothing seems to fix the problem.  

They are connecting to different nodes in the mesh so it is not a problem with a single M5 device.