Npc svs?

[Diego Birmingham]

Have I been oblivious all this time (9 months) or have NPC ships recently started battling each other? I never noticed it before but I was sailing for plunder a few minutes ago and was targeting an Ironwall off the coast or Port Royal heading for PDF. A Revenant was close by and all my broadsides kept hitting the Rev despite being aimed at the Ironwall. At the same time the Wall was shooting at the Rev and sunk it before I could. After that I noticed a lot of shooting between NPC ships and saw some sinking masts where no pirate ship was around.