Okay, just got an SP4 to replace my SP3, and right off the bat I'm having the sleep issues. Basically, mine doesn't sleep when I close the Type Cover (e.g., if the fan is running, it stays running, so the SP4 clearly isn't sleeping), and worse the screen doesn't turn back on when I hit the power button. It's responding, because I can see the infrared camera working, but the screen won't turn back on most of the time. I'm stuck forcing it to shut down, then restart.
Is there a short-term solution to this, or do I just need to stop putting it to sleep (say, change to hibernate when Type Cover closes)? I knew about these issues going in (just love the new screen on the SP4, colors and white temp is just SO MUCH better, plus my SP3 had the ugly yellow stripe on the left side of the screen), and so I'm not complaining. I'm just looking for the best practices in the meantime until Microsoft fixes sleep.