I just experienced a wake up on its own from hibernate where it was on in my bag and getting warm but didn't get past the BIOS or whatever the Surface with spinning dots screen is. Great, this problem is back. I think at this point, I can't recommend a Surface device to anyone... which is sad because, in theory, it's an excellent device but, in practice, Microsoft just screws things up way too often to be reliable. I say this as someone who has lived through both the Surface Pro 2 and now the 4. I'm also having a lot of problems with Skype not sending and receiving messages or delaying them significantly, another brilliant Microsoft product that used to work but has been screwed up over time.