Hello,
check this topic - Matter devices are unavailable - #27 by Welshsmarthome
I have the same problems with my thread-matter network, devices lost sporadic the IPV6 address and don’t get it back…so the devices are offline and not ping able…solution is device power off / on - restart of local network and if this all not solve the problems, reset the devices and bring them back into homey…very very disappointed…Athom bring in the new version v13.2.0 a matter fix, hopefully it will solve the problem soon!?
