I have a Chamberlain MyQ home bridge that was successfully controlling our garage door opener (equipped with an 888LM MyQ control pad) for years, until last Tuesday when we performed the HomeKit "upgrade" after installing iOS/MacOS/iPadOS/tvOS 16.2 on everything.
All of the dozens of HomeKit things in both our homes survived the upgrade just fine, all except for this MyQ bridge.
Now it will work for about a minute after it is power cycled, but then all of the devices behind it will go into "not responding" state. I added an old Liftmaster lamp switch as a test and it goes into "not responding" at the exact same moment as the garage door.
Everything still works just fine with the MyQ app on the phone, just not in HomeKit. Of course, HomeKit connectivity was the precise and only reason I bought this in the first place.
So what did Apple change with this architecture upgrade? What can I do to further troubleshoot why this bridge seemingly falls out of HomeKit a minute after it comes up?