We ran into the camp bug as well, no obvious reason, just finished killing the goblin camp. Wyll died in the fight so in the long rest we use the lich guy to res him. Then somebody in the party yells intruder and all the NPCs go crazy killing each other. Typically one NPC will go aggro and then get killed by another, then immediatly a second one will aggro and the chain will continue until everyone is dead. Tried reloading several times but the problem always happens, oddly it does not always seem to be the same NPC that starts the fight, but somebody always does the second Wyll is resurrected. Completely game breaking since we cannot long rest anymore, please fix.