roller cam and roller lifters/ hydraulic

As much as I love Lunnatti cams , I'd think twice about using their roller lifters, as I'v heard of some issues with them, I know one member on here who I just saw at a car show sunday has them, in his car and he has low oil pressure at idle, and come to find out the lifters actually expose the oil groove ( ever so slightly ) when they are at there highest point of travel, and when idiling the oil pressure is very low. From what I understand lunnatti is aware of this issue but has done nothing to correct it.