Macbook Pro won't wake up with 10.13.1

I am running the High Sierra 10.13.1 on a Macbook Pro (Retina, 15 inch, late 2013) and using an external monitor (Dell UP3214Q) , bluetooth mouse and keyboard. I have been having substantial problems with sleep/wake-up ever since I installed the new OS. Basically once the system goes to sleep for any amount of time more than a couple of minutes I can no longer wake it up. Not by clicking the mouse, not by typing on the external keyboard, not by raising the lid, not through the built-in keyboard, and not with the trackpad. I have reset the NVRAM and the SMC and the problem persists. Is this a known problem with the OS and what else should I try?