HomeKit hub problems – automations temporarily stop working
I have an Apple TV HD (tvOS 14.0.1) plus a stereo pair of HomePods (iOS 13.4.8) acting as HomeKit hubs. Most of the time, the Apple TV is the "connected" one.
Once or twice a day, at seemingly random times, all my automations stop working. When this happens, I can still set any of my scenes, including those used only for automations, by using the buttons in the Home app or by asking Siri. All of my accessories, including those bridged by HomeBridge, Hue, Aqara and Lutron, still work and are reported in the Home app. If I do nothing, the automations magically start working again after half an hour or so.
If I don't care to wait that long, I can reliably restore the automations simply by restarting the active hub. Apart from the failure of the automations, the hubs—both active and standby—all work perfectly during the outages. The automation issue was also present when the hubs were running previous versions of tvOS/iOS. Every time there is an update, I cross my fingers and hope that the automations will start working reliably; but so far my wish has not been granted.
Various solutions have been suggested for the problem, such as rebooting the router, rebooting accessories, or logging out of iCloud then back in. While I have enjoyed temporary relief from some of these, with hindsight I can't eliminate the possibility that the automations would have returned on their own even if I hadn't intervened. For me, rebooting the active hub always and immediately fixes the problem – until it inevitably recurs. The one common characteristic of all the remedies is that they assume local network access. At present, that is not a problem for me; but I agree with one user who raised the issue of how to recover from an automation flame-out that occurs when situated remotely.
Can anybody out there shed any more light on this extremely annoying problem? It is so easy to become reliant on automations that "just work", until they just don't.
Apple TV (4th generation)