Minecraft 1.18.1
Forge 39.0.75
Goblins & Dungeons 1.0.5

The campfires that are spawning in with the structures are ignored as dangerous to walk on for the goblins and trolls. They seem to walk into the campfire regularly and die shortly after. While this isn't a "bug" it does defeat point of the mod when the mobs kill themselves as the player approaches. Suggested solutions could be to update the AI behavior to avoid campfires, remove the campfires from the structures, or make the campfires inaccessible by nearby mobs (raise it up or "fence" it off).