opened up a treasure map form a shipwreck and it turned into a blank map. i dont know if it had to do with having just used a plain empty map from the same chest or if this is affecting all treasure maps. edit: of note i had a cartography table in my inventory

What I expected to happen was...: 
finding treasure. map with an x on it. ** 

What actually happened was...:
used the treasure map and the map wrote as an empty map with no x.

Steps to Reproduce:
1.find ship wreck with an empty map and a treasure map and some paper
2. ...leave chunk shipwreck is on 
3. ...open up empty map to see your base the next chunk over with cartography table in inventory

4. open up treasure map for treasure in next item slot

5. get same map as the now mapped chunk. 

6. do not profit.