Sorry for the delay, but I have a range update. The pistol ran flawlessly with my old gen 3 magazines with the #8 followers, with the magazines and followers still oiled. It will fail to feed if they get a little dirty (known from shooting matches outdoors where I drop them in the dirt). However, 2 of my new magazines did fail to feed, with 1 new magazines working fine (ran 2 full mags through it).
Obviously, there is still something wrong, because I am pretty sure it will continue to fail to feed, at least with the newer magazines when the oil disappears.