SidewaysR1

Ok here is the problem, I have 2 manual boost controllers to control boost on the stock sequential system. I had the primary turbo set to about 14 psi, and the secondary to 13psi. It was fine for the past couple months. Now i am barely making 10psi on the primary and boost response is really slow. It is fine when the second turbo comes online, pulls like a freight train and holds steady at 13-14psi. But i cant figure this primary turbo issue out. I havent changed anything, it was sorta just a sudden change. Anyone have any ideas? What couldve caused this sudden change in boost response? Thanks in advance.