Q: Mid 2015 MBP often won't wake

My Mabook often won't wake from sleep while in clamshell mode. I often have to physically open the laptop to wake it, which isn't so bad, but sometimes even then it won't wake, and I have to force a restart (by holding down the power button).

This is getting very annoying, any suggestions? I've tried resetting PRAM and SMC. When opening it won't wake it, I usually unplug everything first and try to wake it by tapping on keyboard.