Ran 20+ nightfalls across my three characters on Advanced getting the weekly exotic engrams and trying to get at least one Plug One.1 to drop so I can focus it later at Zavala. I even have a Prosperity ghost mod on to up the odds. 0 drops. Got like 30+ armor and random weapons, but NOT ONE Plug. There was also a run that didn't even drop ANYTHING at all, but it was the only one. Anyone know if the drop rate is wonky for any reason? I don't recall nightfall weapons taking so much time to appear.