Posting to see if this has happened to anyone else, while participating in the scourge invasion here on Season of Discovery a Chestguard of Undead Slaying dropped. As a hunter I was the only class that could use it and needed on it.
It took awhile for the loot to disperse and I checked the bodies and there was no item. I typed “/loot” and it showed that someone had not rolled on the item (at least from my perspective) so I waited out the assumed loot timer in case they were AFK. Nothing.
The loot had vanished with the killing of all the Shadows of Doom and the crystal event ending.
Looking to report this as a bug and see other experience.