Smart home · When Matter misbehaves

Matter device keeps going unresponsive, No Response or offline

A Matter device that pairs but later appears offline may have a problem with the device, its hub or its network. Check power and connectivity before resetting it.

Checked 1 November 2026. Apple Home, Google Home, the Alexa app and Home Assistant, from the makers’ help pages as of November 2026.

Thread devices: check the border router first

A Thread device reaches your Wi-Fi only through a Thread border router. The Thread Group points out that with a single border router, nothing can take over when it loses power.

  1. Check that the border router is on, such as a HomePod mini, Nest Hub, Echo or eero.

  2. Check that it’s on the same Wi-Fi network as your phone and hub.

  3. On a Google TV Streamer, check Settings › Network & Internet › Thread network is on.

  4. On eero, check Wireless › Thread is on in the eero app.

  5. If an Apple TV is your border router on Ethernet, Apple suggests trying it on Wi-Fi.

  6. Restart the border router, then the phone.

A second border router on the same Thread network can provide another path when one is off. If your platforms each made their own Thread network, a device on one network depends on that network’s border routers only. The Thread page explains why that happens.

Apple’s steps for No Response

  1. Update your iPhone, iPad or Mac, then close and reopen the Home app.

  2. Join the same Wi-Fi network as your accessories.

  3. Turn on Bluetooth.

  4. Restart the accessory, removing its batteries if needed.

  5. Check the maker’s app for a firmware update.

  6. Unplug third-party Thread accessories for 5 minutes, plug them in, then wait 10 minutes.

  7. Restart the modem and router, then bridges and home hubs, then the accessories, then your iPhone.

  8. Check any VPN or security software for network problems.

If only one maker’s accessories are affected, Apple’s last step is to remove the accessory, reset it and add it again.

IPv6 and multicast on the router or mesh

Matter devices are found and controlled over IPv6, using multicast DNS. Home Assistant identifies network configuration as one possible cause of random unavailability.

  • IPv6 turned off: Google says that without IPv6 on your home Wi-Fi, setup may seem to work and control fails later. Check the router’s IPv6 or LAN IPv6 setting.
  • Multicast filtering: Home Assistant warns that router or access-point settings that “optimise” multicast, and faulty IGMP snooping, disrupt Matter. It also warns about mesh Wi-Fi systems that filter multicast.
  • Separate VLANs: Wi-Fi Matter devices and Thread border routers should share the controller’s network.
  • Band steering: none of the platform makers names it for Matter. Apple’s router advice is one network name for all bands, with every band the router supports turned on, so 2.4 GHz-only devices keep a band they can use.
  • DHCP: the Matter pages don’t mention it either. Apple’s general router advice is a lease time of 8 hours and only one DHCP server on the network.
  • Interference on Thread: Thread shares 2.4 GHz with Wi-Fi. Home Assistant suggests Thread channel 26 if its logs show repeated channel access failures.

The controller or hub is offline

Matter control at home runs through your controller, and remote control needs it online. An unavailable hub can prevent control through that hub; check its power and network connection.

  1. Check the hub (HomePod, Apple TV, Nest Hub, Echo, SmartThings hub or Home Assistant) is on.

  2. Check it’s on the same network as the devices, not a guest network.

  3. Unplug the hub, plug it back in and wait for it to start.

  4. In Alexa, for a Thread device, check a Thread-enabled Echo or eero is online.

  5. In Home Assistant, use the network map’s Refresh topology to see which devices are offline.

Firmware and resets

  1. Check the maker’s app for a firmware update for the device.

  2. Update your hub and border router to their latest software.

  3. If the device is still unresponsive, remove it from the app.

  4. Factory reset it using its maker’s instructions, then add it again.

Google says you may need to factory reset a Matter device and set it up again to fix a problem. Apple notes that battery-powered Thread accessories may need a firmware update before an iPhone on iOS 18 can manage them.

Questions

Why do only my Thread devices go offline?

A border router or its network may be unavailable. Check its power, connection and the device itself.

Should I turn IPv6 off to fix it?

No. Google says Matter needs IPv6 on your home Wi-Fi. Turning it off can make Matter devices stop responding.

Sources

Checked on 1 November 2026.

See your home network from your Mac

Kilobat is a Mac menu-bar app with a CLI and an MCP server for AI agents. It lists the devices on your Wi-Fi and says when a new one joins, keeps a history of the router’s and the internet’s health, scans nearby channels, and shows which app on your Mac is using the network. Read the docs.

Download for Mac ↓
brew install seifip/kilobat/kilobat