i have seen guys restricting the oiling to the rockers on the ersons. using plugs in the orfice in the head, bleed holes range between .06 to .09 depending on who you talk to, do you have them restricted?
i take it this is a newer engine, are the rings even seated yet? without being there it could be a combo of things, intake leaking sucking
oil, getting the plugs wet. what valve seals are on it? you could do a compression test for peace of mind and to rule out the worst.