Last night, a player was revived from the graveyard by the Retributionist. However, the Retirbutionist died the same night. The game bugged and the message indicating that someone was revived never displayed, meaning their name wasn't removed from the graveyard (even though they were technically alive). As mafia, I was unable to kill them because their name didn't show under the player list. We ended up tying, as they couldn't kill me and I couldn't select them to kill.
Image 1: https://i.imgur.com/n4olFwL.png
Image 2: https://i.imgur.com/kQHKSMH.png
As shown in these two images, you can see that Queensbridge shows in the graveyard, but they are also alive within the town. Oddly, their name doesn't show up in the player list, meaning they cannot be attacked, healed, etc.
A similar instance happened in a game just earlier, where a player was hung the day before and added to the graveyard, but their name still showed in the player list.
image 3: https://i.imgur.com/iQGqYCd.png