I have run Bunker E15 today for about 5 hours and K1 Communion a few days ago for around 9 hours trying to get Necrotic Grip. I am thinking there is an issue, as I received one drop of 7 different exotics within my first hour of K1 Comm, and have not received a single exotic drop since. I know drop rates are probably low for farming purposes, but this is absurd if not a bug. Though I assume it is a bug, as I've never seen any RNG like this before. I have sub 10 min runs and always platinum on both sectors.