When I tried to generate a treasure map I found in a ship, it generates with no X whatsoever

the nearest buried treasure is 1502 blocks away at "569 / ~ / 1561"

What I expected to happen was...:
Generate a normal map with an X

What actually happened was...:
Generated with no X

Steps to Reproduce:
1. Seed = 7582387731324969390
2. co-ords of ship are "23 / 62 / 161"
3. get a treasure map from the ship and use it