ARGH! Just did some long keyed dungeon in Forgotten Gods, beat the end boss, opening up chests and click on this pillar thing which is a teleport back to the beginning. I didn’t pick up whatever item is needed to finish the quest! I figured I would just waste another key and run through the empty dungeon to get it, but nope, can’t open it again this session, so I have to do it all over again.
Edit: Apparently, I am not the only one. There is an achievement for beating the boss, 1.5% have that (Banish the Night). And another achievement for turning in the last quest item you get from said boss (Settled Debt). Only 1.4% of people have that. So .1% are either not bothering to finish the quest, or are missing the item as well. I went back and got it.