My wifes had a razor sharp one right there on the rearward facing side after 200 rounds, noticed it when cleaning and it snagged the q-tip. I filed it down, since then she has put another 50 rounds through it.
I also noticed that area was iffy before I shot mine, and ended up filing it gently before hand, rounding off that entire edge. So far it seems ok. I put 100+ through mine, though mine was lubed with fancy moly grease.
These are both 2017 production