PRIME Z790-P Sleep mode bug

[antonvict]

Hello I have PRIME Z790-P motherboard (part № 90MB1CK0-M0EAY0). BIOS 1205 (latest intel ME), PSU: ROG-STRIX-750G (part № 90YE00A0-B0. I have AC voltage stabilizer (inverter, pure sine wave) to which I plugged the PSU

It sometimes does not wake up from sleep mode.
And today it booted OS with blinking power button just like it is in bios mode or sleep mode...
After that "incorrect boot of power button". I put my pc to sleep mode. And then I tried to wake it up by pressing key on usb keyboard.
But it did not start. I pressed keyboard three times before It finally woke up: I press a keyboard button, pc started and immediately stopped to wake. And that happened three times until it eventually woke up
Here is the system info from dmidecode and dxdiad

dmidecode 

dxdiag-txt 

[Silent_Scone]

Hello,

First question would be does this happen without the voltage stabiliser on the chain?

Also revert to Optimised Defaults, leave XMP disabled. Failure to wake from sleep states can be OC related.

[antonvict]

Hello! Thank you for reply.  I already had disabled X.M.P. I only set memory to 5200
Here is what "Load defaults" is
And running without stabilizer in the chain kinda scary... It goes from 200V to 245V. Maybe 250V, I did not see that though. My notebook was burned.... I think by high Voltage spike

stablizer-specs 

edited: I noticed bug appears more often when I plug usb 3.0 devices to usb-c port (via adapter USB-C > USB). It is connected  to usb type-c header on MB (LIAN LI LANCOOL III)