@Cjkre.123 

You'll need to know WHY it is doing it before fixing it? That would mean some testing on the power supply. Using a different electrical socket first, best if on another 'line' in the house. Either that or plug in a lamp and see if it should 'blink' at the time the router shuts off. If you are on a Surge Protector, remove it and see if it helps.

Look at the LOG as well (or enable it for all items to log if not on) and see if there are any clues?

Only possible other problems I'd think would be a faulty power transformer or router itself.

Suggest you contact SUPPORT and let them determine the cause I guess one you've ruled out your electric source.