I've had a similar experience. Bought 4, have not set up any schedules and was rudely awoken by a bedside lamp switching on at 2 am, 2 nights in a row. Also, came home yesterday to find this lamp had switched itself on by itself. Not really saving much power here... The 2nd bedside lamp appears to be fine. No rude awakenings there. The third one I attached to a lamp in my living room and it decided to switch itself off after being on for about 3-4 hours last night. It was fine the night before. Am yet to try the 4th plug. Found they give off a not-so-great high-frequency noise too. May not bother and am thinking about returning the lot as since using these plugs, my whole set-up seems to have de-stabilised. My Google home keeps getting booted off the network as does my TV but, it could be that I'm just at capacity for my old-school modem.
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