In Season of the Hunt Triumphs under the exotic quest tab, there's a triumph called "Lightseeker." The instruction for the triumph says to "find all the Feathers of Light (in Harbinger) in a single week" to unlock a chapter of the "A Tangled Web" lore book. I have gone through Harbinger many times and have been meticulous about getting all the feathers known to the internet in their corresponding weeks, yet I still haven't unlocked this triumph. With the release of Witch Queen nearing us, I'm at a loss for what else I can do to unlock Lightseeker and finish the lore book before Harbinger is gone.