For power on & suspend issue go fetch and flash from your manufacturer the newest bootloader i can do nothing about it!
Please use S82 image that works for your M8S 100% with 2gb ram!
I've updated to your LibreELEC-S8X2.arm-8.0.2a-X8H-PLUS.tar on my Minix x8h plus, and I've also had the same power-on,suspend issues.
Tried also a few other updates from others, but for now I'm using LibreELEC-Amlogic.arm-M8SPlus-8.0.2.tar from Index of /image/LE8/arm/8.0.2 - and that works just fine. Powers off, reboots, suspends just fine.
Really liked that your image thus had wifi recognized and bluetooth too!
Can I help debug?