For me personally, I am going through this for the past month, however its because for the 5 months before I was working basically 50-60 hour weeks with tons of

For me personally, I am going through this for the past month, however its because for the 5 months before I was working basically 50-60 hour weeks with tons of active debugging, coding, and triaging (HW bringup type work). But next month we start ramping up to start new projects. It could just be what you are doing isn't fundamentally that difficult and doesn't require a 40 hour work week and there is absolutely nothing wrong with that. If people think you're worth the money you are getting paid, then you are worth that money. They pay you to get things done, not to sit in a desk for 40 hours a week or be stressed for performance reasons.