My Zigbee network is driving me absolutely crazy. For the last couple of weeks, I have devices that work fine one minute and not at all the next. Then after a half hour or so, the start to work again. I spent a ton of time examining the child devices and routing table and the one thing I keep seeing everywhere are "null" devices. It seems like these are causing problems. I just have absolutely no idea where they came from or how to get rid of them. Any help would be greatly appreciated. I also see devices that are routed via themselves. I don't understand how that is possible or if it is causing problems.
I have about 110 ZigBee devices on my network. Most of them are sleepy end nodes (like contact or motion sensors) but there are plenty of routers as well.
Neighbor Table Entry
[Basement Dehumidifier, 0396], LQI:255, age:4, inCost:1, outCost:1
[Kitchen Wax Warmer, 1C20], LQI:254, age:4, inCost:1, outCost:1
[Tool Room Work Bench Light, 2C53], LQI:251, age:5, inCost:3, outCost:1
[Blue Room Wax Warmer, 3C1F], LQI:254, age:4, inCost:1, outCost:1
[Sunroom Dimmer Outlet, 63A0], LQI:255, age:4, inCost:1, outCost:1
[null, 6405], LQI:255, age:0, inCost:1, outCost:0
[Living Room Wax Warmer, 644E], LQI:254, age:4, inCost:1, outCost:1
[Christmas Tree Lights, 6AED], LQI:254, age:4, inCost:1, outCost:1
[Office Table Lamp, 7F77], LQI:255, age:4, inCost:1, outCost:1
[null, A85E], LQI:255, age:4, inCost:1, outCost:1
[Pool House Speaker System Power Switch, C840], LQI:128, age:1, inCost:7, outCost:0
[Basement Wax Warmer, DC71], LQI:255, age:4, inCost:1, outCost:1
[Garage Air Circulator, F2B4], LQI:254, age:4, inCost:1, outCost:3
[eBay Room Remote Outlet, F55B], LQI:255, age:1, inCost:1, outCost:0
[Blue Room Mantle Lights, FFF2], LQI:255, age:4, inCost:1, outCost:1
[Basement End Table Lamps, FFF5], LQI:254, age:5, inCost:1, outCost:1
Route Table Entry
status:Active, age:64, routeRecordState:0, concentratorType:None, [Kitchen Motion Sensor, B7CD] via [Blue Room Wax Warmer, 3C1F]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Guest Bathroom Window, 3E40] via [null, 8C17]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Logan's Presence Sensor, 46DE] via [null, 86D3]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Tool Room Work Bench Light, 2C53] via [null, 41B1]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Master Bathroom Door, 6246] via [null, 793C]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Logan's Bedroom Table Lamp, DAE8] via [Living Room Wax Warmer, 644E]
status:Active, age:64, routeRecordState:0, concentratorType:None, [Blue Room Wax Warmer, 3C1F] via [Blue Room Wax Warmer, 3C1F]