# Matter devices are unavailable

**URL:** <https://community.homey.app/t/matter-devices-are-unavailable/148583>\
**Category:** Questions & Help\
**Tags:** homey-pro, matter\
**Created:** [January 5, 2026, 8:53am UTC](https://community.homey.app/t/matter-devices-are-unavailable/148583 "2026-01-05T08:53:42Z")\
**Posts on this page:** 1\
**Showing post:** 449

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**Author:** ![Rammstein](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rammstein/32/160309_2.png) [@Rammstein](https://community.homey.app/u/Rammstein)\
**Post date:** [October 4, 2026, 6:32am UTC](https://community.homey.app/t/matter-devices-are-unavailable/148583/449 "2026-10-04T06:32:20Z")

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Well now we will see if Athom have done the right steps / improvements for Thread-Matter troubleshooting because i had a Thread Crash again out of nothing… i already report all details again to Athom, this time with all the requested details from Athom after my last Crash…

 ![Bildschirmfoto 2026-10-04 um 08.20.44](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/5/8/586917dfff68ec82b9acfd330bc062436d7502bb.jpeg)

Here are some lines out from my request to Athom, i only post this lines because maybe someone could help it to see how you should report the fault case like this to Athom.

_Crash again out of nothing - report 8E0333B1_  
_After Homey reboot - report A0EB5C58_

_…after few weeks of more less stable Thread behavior, my Thread crashed again out of nothing during the night, all devices are in idle mode or off…all people are sleeping._

_Well, i have already installed the new Homey software v13.5.1 where Athom implement improvements for the troubleshooting for Thread issues!_

_The Crash starts exact at 03.102026, on 00:40 am with one device (screenshot) and continue at 03:00am (screenshot) with more then 10 devices, Homey attampted to bring the thread topology back but without success, in the Thread-Matter overview you can see devices come and go, there are moments where are till 2 Devices all are back and then breaks all again more then 10 devices…this behavior repeats and repeats again, see screenshot above and attached…so i create all reports, screenshots, ping test, thread informations and made the Homey reboot, after that all devices are immediately back and the topology looks fine, right now again stable since the last 24h._

_Since my last crash i made a change of the BorderRouter, weeks ago, i removed my 3 Apple HomePods because i didnt have any usage for them, so at the moment i have 3 BorderRouter (Homey is the Master all devices are teached directly too them, AppleTV and Aqara G5 Pro) in my system…no Zigbee in use on Homey!_

I _follow your instructions from last time, i made these steps which you recommend me, below the attachments!_\*

\*\*_Athoms requested instructions:_  
_What to send us (so we can correlate fast)_  
_– Failure timestamp + timezone = 03:00am GMT+2 / 04.10.2026_  
_– Homey diagnostics code at failure = Crash 8E0333B1_  
– 3–5 Ping screenshots = attached \*\*  
– Thread Diagnostics screenshots = attached \*\*  
_– Any BR/power/network changes = no_  
_– Second diagnostics code after recovery = Reboot A0EB5C58_

_The Ping Tests are made all to the same Device, in faulty and good conditions, also the Thread informations!_

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_[View the full topic](https://community.homey.app/t/matter-devices-are-unavailable/148583)._