Start by reading and following the advice in this → Guide for Zigbee interference avoidance and network range/coverage optimization
Headliners
- Zigbee Coordinator USB adapter connected via a long shielded USB extension cable.
- Zigbee Coordinator USB adapter (extension cable) connected to a USB 2.0 port, (not USB 3.0).
- Move Zigbee Coordinator USB adapter away from all electronic peripherals and other electrics.
- Add more known good mains-powered Zigbee Router devices that act as Zigbee repeaters.
- Upgrade the firmware on Zigbee Coordinator USB adapter if still have problems.