1-) The system is at its limit , and bios revert back to default setting.
Can this happen without an error, i mean this happened when i turned off my pc and turn on
2-) check your psu
I have a true power 380W PSU, i don't think that something wrong with it, i monitored values and seems working fine
3-) Try a bios update this can help
I have the last Bios version , may be a downgrade will resolve this Issue
Thanks for advise