Another tale of When Cheap Meets Real World, as spotted by reader …
My guess – some crappy Android HDMI stick that’s powered by the TV’s USB. TV goes off, stick powers off, and doesn’t come back without a fight when TV powered back on.
If so, simple, smart remedy is to plug stick power in wall or something other than USB port.
Other guesses?
Taped-on note really finishes off the end-cap nicely. The vendor really busted the design budget on this.