Buried treasure maps in shipwrecks turn into empty maps and do not display any treasure location.

I opened a shipwreck chest and saw that the Buried Treasure Map that is usually found in some shipwrecks had become an Empty Map, despite it having the game tag for Buried Treasure Map. When I used it, it displayed the map as a normal map, mapping out the area around me instead of showing where the treasure is, and it didn't have the Red "X" on it.