Before I saw this I also took off my separator. Looks to me like the oil drainback was clogged. I simple greened it for about an hour (fill, let sit in simple green, shake, rinse, repeat). There is another check valve or valves inside the separator. I blew and sucked the different holes (set my self up on this one lol) after cleaning and seemed like it was working properly. I also had about 1/3 of my JTL catch can filled with oil sludge which i had to clean with brake cleaner and a scrub with paper (I just cleaned it last week!!!!!).
Before this I also put a breather on the clean side and was getting some PCV smell through the vents on idle which is weird because it pulls a strong vacuum @ idle. Will continue to monitor, hoping we figured it out!!!