MacBook Pro sleep issue

My early 2015 MacBook Pro does strange things after I wake it from sleep. Sometimes the screens stay black and doesn't respond. I have tried moving the mouse, hitting keys on the keyboard, even pressing the power button and nothing happens, so I have to reboot. Other times the screen will turn on but none of the programs are responsive but the mouse does move, and the only way to fix it is to reboot.

This all started after my computer froze the other day and when I tried to reboot it I got the flashing question mark. So I went into disk utility and my HDD wasn't there. So I reset the SMC, and it booted normally. I did have this problem a few months back and took it into an Apple authorised service centre and they said there was nothing wrong with the drive, and even when I run disk utility it says there is nothing.

I have tried everything. I have reset the SMC again, nothing still happening. I have also reset the NVRAM again nothing. Also did a fresh install of High Sierra with no luck.

Is there anything anybody else can think of?