I was looting the dagger in dread wastes and the game bugged out and the window closed and it disappeared and i’ve created a ticket with 2 responses now and they say there is nothing they can do. But I can’t loot the item again nor do I have it, sure these items aren’t game breaking but they are pretty big to have 450 ilvls at level 86 there should be some remedy in place to avoid this from happening like either allowing you to loot it again or sent to your mailbox.
I had the exact thing happen to me (Elwrey-Benediction) with the exact item. Even got achievement credit. The loot window opened and closed instantly and no dagger in the bags. Apparently this was an issue in original mop and people did get successful GM resolutions.