Help debugging surges in unicast failures in my ZigBee ZHA network


Basically the attached image shows how my 150~ device network is performing over time. I see a steady increase in unicast failures and they reset to zero when I restart HA or reload my coordinator. But occasionally I see the rate of failures increase as denoted by an increase in gradient/slope. I’d like to be able to try and pinpoint what could be driving this increase or potentially automate a reload of my ZigBee Coordinator as a bit of a watchdog type approach. Any suggestions appreciated!

Note that the jagged line on the right steep slope is a scrolling screenshot issue. It’s actually a smooth slope.