Yes, v1.1 has a bug. It’s almost certainly due to a tiny, tiny error somewhere. I am doing my best to fix it. Don’t play v1.1 – there’s no point.
Edit: looks like for some reason, a single line of code from v1.0 disappeared. It was probably an accident while I was changing the name of the folder the game saves to. The result was that the file which keeps the map data was getting deleted.
Edit Again: Tests seem to confirm this. In v1.1, dying caused the game to delete your found areas. With the line of code back, everything’s OK.
Last Edit: I’m uploading a patch.