Yeah definitely sounds like a leak.
Be careful driving it like it is onto boost - basically it will be like not having a working wastegate.
Your turbos will start spooling, but the pipes wont hold positive pressure. So you can have the turbos spinning really really fast, fast enough that theyd be making like 20psi normally, but with 0psi actual manifold pressure, so thats all your wastegate sees and it wont open to regulate the turbo's speed.
So yeah, dont go hitting 0psi because as soon as you do that you dont know how hard your turbo is being worked...