Demon key stuck in a corridor in the Muse of Lethargy and Despair section of Operation Demonflame. Details as follows:
Playing a new Witch AT (first witch). Just hit level 16 shortly before end of previous section of the mission arc. Solo run.
After a smooth start, had trouble getting past Winds of Lethe and the 2 defending sloth demons and died a few times. Went into the Zen store and bought additional triumphant recoveries during one of these deaths while still lying on the floor in the chamber of Lethe, then hit recovery button to go back to entrance of tower. Had to do that 'corpse run' about 6 times in all, and used 2 triumphant recoveries as well. Finally got the Winds of Lethe done and went into final corridor to chamber containing the avatar. Just past the turn in the corridor ran into a bunch of flying imps and for some reason after I took out 2 of them I couldn't seem to target the remaining ones and they killed me (NB. I've been thinking about bed since 3rd time the 2nd sloth demon killed me, so I might have miskeyed.). Cue another 'corpse run' from the tower entrance. Got past them and the last bunch ok, took on the final guardian demon in front of the avatar (not a problem), and the 2 broodmothers in the chamber (np), and the final batch of flying imps (np), and then realised there was no sign of the demon key. I backtracked down the corridor and found him standing in the middle of the corner of the corridor, staring at an empty niche in the wall. Nothing is obstructing him: he's clear of the wall -you can run all the way round him and there are no mobs hiding in the niche. He needs only to turn 50-60 degrees to his left and he'll be looking straight down the final of corridor. But he's completely unresponsive. Reluctant to relog as I am really beyond bored with all the hassle I had with the sloth demons and the winds of lethe (actually main frustration was why is the respawn point at the tower front door and not at the later point where you start actually ascending the tower? It's not as if the tower refills with horrors between runs.), and if the demon key sticks again so close to the close, I will not be a happy camper.
If this has been reported previously, apologies but hopefully there's enough detail here to fix. [Edit] (Also reported this in-game now as bug report ID #4,806,729.)
[Edit 2] Honest I did search before I posted but now I've found an old thread (from 2011 but last updated as still ongoing June last year) under Demonflame: Demon key stuck in gameplay bugs. Can someone consolidate this post into there? Cheers.