So I suspect there is something else going on here that is not performance related as I have removed most all custom apps/drivers and I am not seeing any signs of slow hub performance. Yet the Zigbee network is still randomly dropping or going "offline"
I attempted to add a Iris V2 motion sensor yesterday and it failed to pair and during the pairing process the Zigbee network went offline. After turning off the Zigbee radio and back on I was then able to successfully pair the device.
Now I know there is a limit of 32 Zigbee devices connected to the hub directly, but I have 5 Iris v2 outlets around the house to help strengthen the mesh and allow for more devices.
Currently I have 36 Zigbee devices with plans to add more.
All my device have a good RSSI signal of -60 or less and the LQI rarely deviates from 255. I am using Zigbee channel 15 currently.
The Iris outlets are spread out evenly around the house and the hub is centrally located on the main floor. Also my Zigbee devices are also spread out throughout the house.
My UniFi AP has also been setup with the proper channel to avoid interference with the current Zigbee channel. My house is also an interior lot with basically no other RF interference in the area.
At this point I am running out of ideas. I do have additional Iris outlets that I could add, but I need to find the root cause of the problem first.