Badger Dog Brewing

Question for others who are using a steam condenser. I installed one on my brew kettle through the lid and added another port to add hops. I have a hop spider hanging below the second port to catch the hops. I ran multiple water tests and the system worked flawless even at full boil ( I am lucky in that I have 110 psi water pressure at my house so the mist nozzle really puts out some volume). The problem that arose was during the first wort boil. The system was working fine until I added the pellet hops and then it was like someone dropped a firecracker in the kettle. The hops just about exploded out of the hop spider and coated the inside of the lid and even managed to get out through the steam condenser. Does anyone have an idea how to prevent this from happening? Thanks