One misbehaving device can cause havoc on the zigbee mesh.... I had noticed one device after another stopping communication over the past few days.. I had also noticed some delays creeping in from device events..
Looked back in my logs and noticed it started after I installed a new zigbee plug/repeater...
I unplugged the device and rebooted my hub and everything is working now... I know it wasn’t the reboot alone that fixed it as I had rebooted my hub yesterday after the ring issue..
What’s really odd is it was causing devices I had installed starting to show up as null devices... Weird...
Probably a buggy firmware on the device.. I will try and get a firmware update for it tomorrow and see if I can get it to behave...
Just wanted to share