Help troubleshoting zigbee devices

Configuration Zigbee
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1

So my zigbee devices seem to either be failing or the control is failing and was wondering if anyone has good suggetions to sort out which device('s) are the problem ones.

Im using a Sonoff Zigbee 3.0 USB Dongle Plus and zha for comunicating with devices.

Is there any way to run some form of diagnostics on the Sonoff dongle to confirm its working correctly?

What about for individual zigbee devices?

2

Working your way through this would be a good start: Zigbee network optimization: a how-to guide for avoiding radio frequency interference + adding Zigbee Router devices (repeaters/extenders) to get a stable Zigbee network mesh with best possible range and coverage by fully utilizing Zigbee mesh networking