I have the same issue. Almost very day “no response” in all Apple Homekit devices. I have a C8 in the lastest FW and an Apple TV 2023 as homekit hub
Here’s how you confirm or rule out mdns issues on your network causing this.
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Was this with the restart every 1 hour setting enabled or disabled? With that enabled it should die every hour for a few seconds.
No, the only non-manually generated restart would be at 2:35 am if memory is too low.
It “no response”d one hour after manually restarting to restore connection.
Sorry, you meant “restart HomeKit integration” hourly.
Yes that was on, but it went no response and stayed that way.
Turning restart option off for testing.
See my post at Done with Hubitat Homekit for now - #10 by TArman
I'm having the same problem. Regularly see "No response" in Apple Home app. Restarting the integration hasn't work, only rebooting Hubitat works.
Have Hubitat C7 and 3 ATVs, all are hardwired. Hubitat has static IP assignment.
Is this a widespread issue?
I have the same issue.
Restart hourly does not fix this in my case.
2x Apple 4K TV (2022) - hard wired to network (latest FW)
1x Hubitat 8 (latest FW)
1x Hubitat 7 (latest FW)
2x iPhone 13 (Latest IOS)
If I do nothing, it seems to "fix" itself after a few hours.
If I reboot HE(s) this issue is also fixed.
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I now do this “ping/ack” once every 6 hours and have not seen this problem since I started using it.
I don't mean to necro an older thread - but I'm a bit confused. I implemented your ping/ack system a few days ago. I got two push notifications on my phone at midnight and 6am that the connection was alive - and then, homekit went offline and no matter what I do I cannot get it to respond anymore. Rebooting hubitat, all appletvs, firewall, wifi, etc - nothing brings homekit back now. I THINK there was an update yesterday for hubitat but do not recall the version or release notes. I updated again just a half hour ago to the new release of hubitat and it is not responding STILL. I have disabled my ping/ack rule - rebooted everything several times again - and yet, there is no love for HomeKit with hubitat. My cameras from scrypted.app in homekit are working fine still. But 99% of my homekit is from hubitat and none of it is resonding at all. I aded my ecobee thermostat a few days ago as somehow it was missing from my homekit instance, so that is another directly connected item, not hubitat related and it does not show up either.
About 1 week ago I installed an opnsense firewall and had things working great 3-4 days ago but don't want to rule out some bad issues with that either. I see NO blocked traffic at all for anything hubitat, appleTV, or device IP related - but homekit is still unresponsive for all devices except cameras. Any ideas perhaps?
No idea 
. I slowly extended the interval between the calls to the “ping” until I finally just turned it off 
. I don’t use it anymore and have not had an issue in a while.
Don’t know how or why it worked but it’s now gone from my system.
