When I ride a boat onto land, then exit it, the boat will teleport to the last location for which it was in the water, along with any entities that were in said boat (excluding the player who left it). Occasionally it will teleport to the location at which I entered the boat, and sometimes after it has teleported, it becomes unresponsive and I can't enter it or break it. On those occasions, logging out then back in again will cause the boat to return to the location where it was actually exited, with the player taking significant drowning damage if they were on the boat in the water when the game was left.

Video of bug: https://youtu.be/TnTmYvZDIOE