Nexus Snow Helmet with MIPS

I purchased the Nexus because of its superb venting features, but after using it in cold (non-venting weather) conditions I discovered that when both vent sliders are in the forward position there is an uncovered opening at the back end of the forward slider that acts as a permanently open vent. I was not wearing anything under the helmet (just hair) and noticed that the upper part of my head was cold and experiencing a breeze. I'm very surprised that Smith's top of the line/most expensive helmet has this design flaw. I know the permanently open vent at the top of my head won't be a huge deal on many warmer days, but on cold days it's very disappointing. A well vented helmet made for skiing should perform equally well in the warm as well as the cold.