Treasure Map has only one set of directions

It's really hard to explain this bug.The treasure map seems to only show movement in East/West direction. North/South movement isn't shown on the map. So I can find only one coordinate, not the second, making it impossible to pinpoint the treasure.

You see in the screenshot I seem to be right next to it, like I can just walk a few steps to the left and be right on top of it. But that is not the case. I can walk infinitely to the left and still be exactly where I am on the map. If I move forward or backward from the position shown, I miss it entirely. I dug for a day and a half and gave up.

I forgot to add- seed is -3022597718180902577
The treasure map was in one of the chests in the shipwreck at about 358/67/41