I was in the middle of doing a Sirocco Caverns when I had to return to town to sell. Upon salvaging an item at the black smith several items fell to the ground at my feet including a tier 0 sigil with the name of “!!missing!! - -I:name nightmare sigil”, the sigil is unusable. I returned to the dungeon to find that the objective was no longer present but it had not reset. There were mobs still there, areas I had cleared were still clear and I ported back to the spot I came from. The items that dropped would not salvage with the all junk button and had to be salvaged individually.