Skip to content
MappleCare Community ↗

MappleCare Community

Reply To: [Solved] Apple TV 4K encountering Matter Accessory Showing ‘No Response’ in Apple Home App after update (HomePod OS 18.1)

Find answers from other Apple users or start a discussion about your device.

All Forum Rooms

Home › Forums › HomeKit, Apple TV & Smart Home › [Solved] Apple TV 4K encountering Matter Accessory Showing ‘No Response’ in Apple Home App after update (HomePod OS 18.1) › Reply To: [Solved] Apple TV 4K encountering Matter Accessory Showing ‘No Response’ in Apple Home App after update (HomePod OS 18.1)

November 14, 2026 at 9:33 pm #12688
Joan Walter
Community Contributor
Apple Recommended / Verified Community Solution
This canonical solution was verified and marked as solved in the Apple Support Community archive.

Enabling IGMP snooping / multicast forwarding and rebooting primary Thread Border Router.

Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

  1. In home router Wi-Fi settings, enable IGMP Snooping and disable ‘AP Isolation’.
  2. Power cycle your primary Thread Border Router (Apple TV 4K connected via Gigabit Ethernet).
  3. Power-cycle the unresponsive Matter accessory for 10 seconds to prompt a fresh Thread mesh re-route.

Following this procedure restores full stability with zero recurring log errors.

Apple Vision Pro (1TB) | Mac mini M4 Pro (48GB) | Studio Display | Atlanta, GA
Apple Certified Support Professional (ACSP) | visionOS Spatial Computing Developer