When you place a map into an item frame, then take it out again the maps player pins wont move and you cannot update unvisited sections and make them visible on the map.

Steps to Reproduce:
1. Place a half "seen" map into an item frame
2. Take it out
3. Try to make the rest of the map "seen"

Please fix this bug asap as when i put the maps in the item frame i would have been content to leave the there but I noticed part was still blank and... yeah