I had an issue with pre-prepared content on a map which got lost during session changes, which I posted here:

With the help I got there, we were able to track it down to the spaces/blanks in the filename.

When the filename contained spaces/blanks, everything I prepared/did on the map, got lost after logged out.
This included masked area, pins, players, ID name ...

Removing the spaces in the name fixed this.

Is this wanted behaviour of FG ? Is the limitiation that you can NOT use spaces/blanks in campaign map filenames documented?
Was this due to the amount of spaces?
The filename in the demo campaigns do not use spaces either. The campaign names do allow spaces.

Anyway just wanted to report this in case somebody keeps track of this :-).