Zigbee devices (ZHA) became unresponsive

Configuration
1

Since yesterday night a lot of my zigbee devices became unresponsive or very laggy.
I use ZHA with the Sonoff stick. Now today some devices are back online, some are not. I didn’t change anything since then.

I also use a long cable from the Raspberry Pi to the Sonoff stick.
I’m on the newest version

Core 2024.4.4
Supervisor 2024.04.0
Operating System 12.2
Frontend 20240404.2

Any ideas on how to troubleshoot?

2

Might be a power supply problem if you have anything else using USB ports on the PI (eg SSD). A powered USB hub would prevent that - has to be USB 2, though; USB 3 causes interference.

Otherwise, how many mains-powered devices have you got in the Zigbee mesh?