So, I made a bit more than a month ago. It is the map of a multi-decked cruise ship (very cool, using it for a pulp era campaign) that I took a few hours to put in dynamic lighting - two different colored lines, one for the permanent walls and another for doors and windows. Yesterday I went back to the map and the map had moved, though that was easy to deal with, just move it back, but worst is that all of the dynamic lighting except for a very small bit had disappeared. Has that happened to anyone else? If so, do we know why? And will it continue to happen to maps I build but don't go back to very often?