Earlier quoted context omitted.
Are you on a network with some kind of firewalling or tracker blocking? I wonder if they are programmed to stop working if they can't phone home after exiting dumb mode? Or if there's an activation step they never planned to need recovery from failure of?
I don’t think it was intentional, talking to their tech support, there was no way to restore it to function. I suspect a bricked firmware update.
If you have the hardware programmer you can most often update the flash directly.
I don't expect everybody to have all the hardware programmers on hand. But I would gladly go to a repair shop to get a quick firmware flash to unbrik some device. Of course this is probably not worth it for manufacturers. It's so infuriating because most device even have a relatively standard programming port already (though you need to open open the device to access it)