I set two traps, picked them up and set the last one and went on to do another quest while I waited and after returning and picking it up, it updated correctly. However, shortly after, I was killed by bandits, and had to revert to a save after I set the final trap but before I picked it up. I went to pick it up again, and now the sound of the nightingale was active again, and when I pick up the trap the quest doesn’t update. I thought it might be possible to talk to the guy in Rattay, since I have the three traps in my inventory (weighing me down with no ability to drop them), but no such luck. So now I’m stuck with 6 less Carry Capacity and no money from the quest, essentially.