Seems this is systemic - a bug tracker exists with a couple people commenting: https://dgcissuetracker.com/browse/EQ-1395 Last step of progression cannot be completed due to missing ground spawn in Frostcrypt. Curious if anyone has succeeded in completing Plane of War progression in the past few months.
The item is spawning correctly but Icecore doesn't (it's supposed to spawn upon picking up the item) even if you're at the right step in the quest.