Resmed airfit n20

I just switched from nasal pillow to N20 last night and this may be a very stupid question, but I am not sure if I did something wrong. It was on properly and the tightness of all stepped one properly, but the whole time I wore it I could feel air coming out of some type of “vent” at the top of the mask so it felt like more air was going out than in. It sounded like a waterfall or sound machine all night in just that air comes out. Is that normal??? I want to be clear it wasn’t leaking from the mask itself. Just at some vent I believe at the top. Looking for insight, thanks.