rx5670 I will stand by my statement that firmware on your box does not work properly with standard Amlogic suspend/poweroff procedure implemented in kernel. If the vendor uses some non-standard way of suspending, I welcome them - or you - to submit patches that fix suspend in LibreELEC.
Like mmpp said: it's up to vendor's firmware to handle IR wakeup, CEC wakeup commands and LED colour when suspended. Every box's firmware that I have implements this properly and I have many "no-name" cheap boxes.