Tavern Scene Bug

Sometimes, randomly during a game, the exact miniatures from the default tavern of the rolling bones scene show up. This bug can happen regardless of the number of NPC's already on the scene. I do not know why it happens.
My browser version is: (do not change)
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36