Hi Ane,
I'm also having issues with the map saving in my single player world. (I'm referring to the map craft item that fills in as you explore- not the terrain map for the overall game). It fills in just fine while I explore my yland while playing, but all the progress I make filling it in is lost every time I save and exit the game, meaning the map becomes blank and I have to start filling it in from scratch every time I play. This is frustrating because it has deterred me from travelling too far from my base for fear of getting lost the next time I play. Any suggestions for a temporary fix?