I recently updated to play the 20w17a snapshot and continued building my castle town build. When I went to go update the map of it the picture was all messed up in that lines were now running across the entire picture as if they had been dug into the ground, despite me not doing so diffing any holes like that (see photo attached). I do not know why this happened. I know that a world can get corrupted when playing snapshots and I am new to playing on snapshots (started maybe 6 months ago) but nothing like this has happened to me before. I just wanted to know whether my world is corrupted (which kinda sucks if it is) or if its a bug.