UPDATE (11/5/14): The new v2.01 update appears to fix the widespread Rest Mode issue, so if you've downloaded that, it should be safe to put your system in hibernation again.
Original story follows:
Earlier this week, Sony released a new patch for the PlayStation 4, and if you've downloaded it, here's my advice: be very, very careful.
See, the PS4's v2.00 patch, which adds features like SharePlay and a new app for YouTube, also brings with it some major technical issues. In addition to a host of random problems reported by a sprinkling of PS4 owners across the web—volume fluctuations, inconsistent connectivity, etc.—there's one issue that seems to be affecting a whole lot of people: Rest Mode doesn't work right.
Last night, I put my PS4 in Rest Mode, and when I woke up this morning, the console wouldn't turn on—I had to manually reset it, potentially risking damaging the system and its files. Same thing seems to be happening to a lot of other people, too.
A few of us here at Kotaku have had firsthand experience with this Rest Mode problem, and scans through Twitter and Reddit reveal that it's a widespread issue. Some Redditors have suggested potential ways to fix it, but none of them seem to be foolproof.
When I reached out to Sony yesterday, they said they're looking into these issues, but there's no word on an ETA for a fix. For now, I recommend just turning your PS4 off entirely when you're done with it. Better to be safe than sorry (and bricked).