Question My PSU turns off only on sundays

[Rvrs23]

Hello there, I am very confused rn. I have a PC, with a Corsair CV650(650w). Ryzen 7 3600x, and a gtx 1650S. My PC works fine all days of a week, I use it for gaming, work, rendering... But on Sundays, the pc suddenly turn off because a PSU error power error. It's strange bc it only happens on Sundays I had this problem for two weeks from now.
Anyone has any clue? Should I change my PSU?

Pd: Srry for my English

 

[Rvrs23]

My PSU is giving me some problems I'm gonna buy a new one, any recommendations for a good PSU that will last long time and function well, 650 wats ~. I don't have budget .