How to reproduce:
1) Put a boat on the ground (or in water, in this snapshot boats work on ground)
2) Enter the boat
3) Press one of the keys used to walk sideways to make the boat spin (A or D for qwerty keyboard) or go forward
4) Leave the boat, the boat stops spinning or moving
5) Enter the boat, it continues spinning or moving

I think the game actually pauses the animation instead of not displaying it.
To solve this, you may reset the animation when the player exit or do not pause the animation.