Private Dicks
Prompt
My Matter-over-Thread devices in Home Assistant go unavailable a few times a day. It started after I turned on IGMP snooping and multicast enhancement on my UniFi network. HA runs on a Pi, and the IoT devices are on their own VLAN. What's most likely going on, and what should I check first?
Answer guidance
Good answer: Names mDNS and IPv6 multicast as the likely cause. Suggests turning off multicast enhancement on the IoT SSID and checking IPv6 and mDNS reflection across VLANs. Gives the checks in a sensible order. Doesn't invent UniFi menu paths.
