HomePod 2nd Gen Shuts off after startup (see video)

Initially, the HomePod would occasionally shut off during playback. I could temporarily fix this by unplugging it and plugging it back in after 10 seconds.

Hoping to resolve the underlying shutdown issue, I then performed a factory reset.

Now, the device is stuck in its factory state and shuts down every time immediately after the startup chime.

See video below:
Video recording