HomeKit accessories go “No Response” after about 15 minutes.

I have had HomeKit smart outlets working correctly for years.

Within the past few weeks, the outlets stopped working.

When I re-install the devices, they work for a short time, but then I get the “No Response” status in the Home app.

Wi-Fi outlets

Last night I re-installed two WiFi outlets and they worked fine at first, including running an automation. After about 15 minutes I got “No Response”.

Bluetooth outlet

I re-installed a Bluetooth outlet and it worked fine, but would not run an automation. After about 30 minutes I got “No Response”.

My Wi-Fi router, an Xfinity Xfi modem, indicates the signal to the devices is “strong”.

My HomeKit Hub is a HomePod.

The Wi-Fi outlets are in the same room as the router.

The Bluetooth outlet is about 6 feet from the hub.

Over the past month, I had problems with intermittent Wi-Fi, but that was solved last week.

My hub, iPads and iPhones are all running 16.2.