There’s seems to be a problem in the rooms with the Liches you have to kill in order to battle the dungeon boss of Strongmont.
After clearing the room and defeating the summoning lich the game still thinks that there are enemies around. This is especially annoying if there’s a fishing spot.
EDIT: Leaving and entering the dungeon removes the mobs’ red skull from the dungeon map, but the summoning lich is back and you can use the fishing spot. Approaching the lich leads to a battle.