I don’t think the recently reissued dreaming city weapons are dropping. I have gotten at least 30 dreaming city drops that should have the twilight oath, tigerspite, and abide the return the in loot pool, but I haven’t gotten any of those weapons. It could be just bad rng, but I don’t think that’s what it is.
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Yes they are bugged. Bungie changed how they dropped when they were sunset so that they stopped dropping once you unlocked them in collections. New players can get one roll of each weapon, and older players won't get any drops. It will probably be another week until they actually make a statement on it, then another one for them to actually fix it.