bypass valve

do people have a leak in their bypass valve, or blow off valve during idle. i noticed when i pull the vacuum line off, it doesn’t leak. i’m assuming it’s supposed to work this way, i mean it seems right. the vacuum should be releasing air,and when you start at 0 and past it will shut fully untill the vacuum starts up again. Tell me if this is a problem.

Anyone have a spare manifold in the bay area for an internal wastegate?