twocows

As of Rel19, unable to reproduce. Only tested with two characters, however; I don't think my computer could handle five instances of the game. Tested both in a dungeon (group loot) and outside a dungeon. Screenshot [URL="http://i.imgur.com/MZJqhyl.jpg"]here[/URL]. It is worth noting that the node didn't disappear, but that's a different bug.

Edit: this may have been affected by my GM mode being on. I didn't think of that. Someone else may want to test.

Edit 2: tested using GM mode off, still cannot reproduce.

This seems to be fixed as of Rel19. I cannot reproduce using either quest 788 or the recommended quest, 738. Either fixed or not a bug.

Relevant screenshot [URL="http://i.imgur.com/R5uQxzI.jpg"]here[/URL]. Note that I also tried without any extra bags attached to my character (so just the original backpack).

As of Rel19:
The merchant sell price for Amulet of the Moon is correct. It still cannot be auctioned even with full charges, though. Did not test others listed in the GitHub comments.