I got stuck recently during solo hourglass. Sail half raised, wheel turned, I shot off for a board leaving my ship safe (or so I thought).
I killed the enemy pirate, set fire to their ship, grubs on the stove, everything I could to damage the ship. Given the recent blunderbuss knockback I was still not as confident that I could avoid getting knocked overboard, so I kept the ship anchored and relied on fire to slowly sink the ship. Eventually, I won.
When I got back to my own ship via mermaid, it was in the middle of one of the smaller islands (sandy shallows I think, the one that looks like an ear). So it was JUST in water and would not despawn. I could not move it using sails, and the harpoons would only grab on briefly until it was fully on land, harpoon would detach, and I’d slide back down into the middle. All of this happening whilst I’m aware hourglass is active and I may get invaded.
No kegs, so that wasn’t an option to nudge me out. I did eventually manage to escape however as 2 red ocean crawlers spawned! I lured them to the side of my ship and eventually they ground-pounded me free! It was pretty interesting, frustrating, intense.