I've had hibernated laptops wake up for whatever reasons in bags before. They get super-hot and shut down.
Come to think of it, they were Dells. Perhaps some switch is not properly debounced or something.
Come to think of it, they were Dells. Perhaps some switch is not properly debounced or something.
You might want to check the event viewer in cases like that.
The last time I turned it of, I removed the battery. It is pretty silly that my laptop in 2021 can't do what my first laptop could do in 2003. Even worse, it is a Thinkpad. I expect better from those.
Sometimes caused by drivers or periphery. Good luck disabling them all.
No idea how modern sleep plays into this. The Linux hibernate turns the system off for real (battery can be removed).