The pirate ship sometimes glitches physically when spawned at the rear left, or farthest northwest, dock space at Port Jackson. It may flip sideways, backwards, upside down, be flung to another spot, or even end up on the plaza without receiving any sailing control input. This was recently demonstrated by another player, and I saw it occur with mine in subsequent attempts at spawning my pirate ship there. I am including a video example of my pirate ship glitching and flying away when spawned: https://streamable.com/duh17v