Connectivity issues with IKEA remote BILRESA

[hexed spade]

I have some issues with the BILRESA.

I got the Dirigera and connected it to my network. I have my HA instance running on a pi which is physically out of reach.

I am running the ghcr.io/matter-js/python-matter-server instance on the pi as well (even though it does not have an USB dongle to support thread). I have connected the Dirigera and also the KAJPLATS which all work perfectly fine. However the BILRESA seems to have connection issues. I keep receiving those errors

2026-01-07 15:24:29.536 (MainThread) INFO [matter_server.server.device_controller] <Node:15> Subscription failed with CHIP Error 0x00000032: Timeout, resubscription attempt 0

2026-01-07 15:24:32.688 (MainThread) INFO [matter_server.server.device_controller] <Node:15> Re-Subscription succeeded

on the matter server running on PI. Does anybody have an idea?

Or is my plan fundamentally wrong? Like

Smart Home devices (BILRESA, KAJPLATS lights and so)

^^^
OVER THREAD
vvv

DIRIGERA

^^^
OVER LAN
vvv

MATTER Server running on PI

^^^
OVER HA MATTER INTEGRATION
vvv

HA instance running on PI

[umbral crag]

This should work; the matter integration is designed to be able to communicate with thread devices through an external thread border router like the dirigera.

since you're not using HAOS, there's some network configuration details you have to be careful about on the host operating system - see https://github.com/matter-js/python-matter-server/blob/main/docs/os_requirements.md#requirements-to-communicate-with-thread-devices-through-thread-border-routers - if something is wrong there, you might be sometimes missing the route needed to send ipv6 traffic to thread devices, which could cause timeouts.

i have heard of other people with timeout problems on some of the new ikea devices but i don't know if there is some more general problem. I'm not seeing any timeout errors on my BILRESA.

very strange that you would only have issues with the switch but not the bulb. Home assistant asks permanently powered devices like bulbs to send updates every minute, but it asks battery powered devices like the switch to wait longer between updates - only once every 10 minutes - to save power.

[young prism]

did you get the switch and the bulb in a bundle? if so - the switch and the bulb come pre-paired via ZigBee touchlink. Factory resetting the switch might help to make it matter commissionable again.