Sorry, didn't think to grab an autosave before it got overwritten, so I'm no help in reproducing this but I did want to go ahead and post to see if anyone else had seen this issue.
I was playing as Nobunaga and received Suleiman's special achievement, Barbary Pirate. I obviously wasn't using Suleiman's power of converting barbarian ships, but I had been killing a lot of them and the achievement popped up right after I had sunk yet another.
I was playing as Nobunaga and received Suleiman's special achievement, Barbary Pirate. I obviously wasn't using Suleiman's power of converting barbarian ships, but I had been killing a lot of them and the achievement popped up right after I had sunk yet another.