What is you catch setup? Same with the original poster? If not I bet your blowing boost into the crankcase, classic symptoms of that. Are you using filter media inside the can? Did you both remove the stock breather box and use the pcv for the catch inlet? That will give you great swirl/filtering effect and function as a check valve stopping boost pressure from sailing through the catch. At the very least both of you should have a check valve put in on both sides of the can itself (since it’s cheap) and see if the issue subsides. You both have good tunes, so it is definatley in the hardware.