Ikea Inspelning Plugs going Offline random

What happened?

I have a Zigbee network with around 100 active devices. From those devices there are 58 router.
I run Zigbee2MQTT in a docker container with more then enough resources and my Wifi channel is not overlapping, neither very close wifi in my environment from neighbors. My Coordinator is a smlight slzb-06, connected on POE.

Currently I have 10 Ikea Inspelning plugs active. At least 5 of them sometimes go to Offline state. It can run stable for months and then suddenly they are completely unresponsive. They never go together, it's a total lottery. They all run 20240801 (2.4.45) firmware.

At that moment I can't do anything with that plug anymore, I can't reconfigure or reinterview the device anymore. Reloading Zigbee2MQTT container doesn't make a difference, neither rebooting the zigbee dongle. The only thing that helps is physically pulling the plug out of the outlet and placing it back.

Strange thing is that some plugs have this issue regularly, some have had it once and some haven't been in this state.

For the rest I don't see any issues on my zigbee network, apart from lights which go on after a few seconds, like one in 20 times.

Is this plug just bad, or am I doing something wrong? At this moment I have no plug unavailable, since I rebooted them all. Are there any steps to troubleshoot this, or is it proven that the problem is inside these plugs?

What did you expect to happen?

No response

How to reproduce it (minimal and precise)

Did not found a trigger yet to reproduce it

Zigbee2MQTT version

2.12.1

Adapter firmware version

20250321

Adapter

SMLight slzb-06 connected on POE

Setup

Containerized in docker with docker-compose

Device database.db entry

No response

Debug log

No response

Notes

No response

Start by capturing a Debug log and the device database.db entry while an Ikea Inspelning plug is offline, then compare affected plugs with the listed adapter firmware and Zigbee2MQTT version. Done means finding a reproducible trigger or enough evidence to distinguish a plug or firmware fault from Zigbee2MQTT behavior.