I have a surface pro 4 i7 512gb. Have had it for a couple months. I am constantly having wake-up problems. Tried all kinds of things on the zillion threads I've read including turning of Windows Hello. Nothing helps. It will go for a couple days fine, then it starts again. Very problematic. Seems to always happen when I need it right away. Basically when I shut it, or put it to sleep with power button, it very often won't turn back on unless I do the 2-button (volume, power) 30-second hold shut-down procedure then turn back on. It always comes back on in that case. Of course I have lost all my open screens, etc. and it's a slow process. I am starting to think I have a lemmon. All updates are installed.
If there is a real fix, I do not know about it.
Incidentally, I also have a surface book i7 and I do not have this problem.