I have this very issue my router is an apple time capsule and i am using an apple tv. Apple tv 4k shows no response in apple home app.

Add Homekit To A Garage Door Opener Via Myq Home Bridge 9to5mac
Apple homekit no response. Tap on your profile your name at the top. Check for alerts in the home app. Everything works fine for days at a time the same no response in homekit issue only happens and requires a reboot to correct every few days. 4 and assumed it was connected to problem solved yesterday by the issue of ios 1121 but all my homekit stuff is still showing no response. Can anyone advise how to resolve this problem. I added my homepod to the mix yesterday and since then i have been getting more and more no response notifications.
If homepod isnt responding make sure that homepod is turned on. Make sure that homepod is plugged in to power. Wait a few minutes. Check to see if home is toggled on. On your ipad go to settings home and make sure that use this ipad as a home hub is turned on. What am i missing.
Then tap the top of homepod. On your apple tv go to settings accounts icloud and make sure that your apple tv shows homekit as connected. Make sure youre logged into your icloud account and that home is enabled open settings. There would be an occasional no response in the home app or from siri but those were usually temporary. The sensors on each side of the door are wired and there arent any batteries in them nor are there any on the wall panel. If homepod cant connect to your home wi fi network access your apple id or theres.
Check your wi fi. Homekit no response frustrations i have been using homekit fairly successfully for about a year. Works for about 10 minutes then becomes no response in the homekit app. If you dont see homekit then your apple tv isnt connected as a home hub. Restart your apple tv ipad and iphone. Ill try to get more details about the logs and post them when i can.