Framed Maps are disappearing. Saving and reopening the game doe not restore maps. Maps seem to be gone forever.

To Reproduce I did the following:

1) Create a 3x3 section of framed maps (where all maps are default zoom level and flow together)
2) Play game as normal
3) Note that some maps (and frames) disappear (See screenshot of the 6 missing maps)
4) Exit the game
5) Reopen the game
6) Maps are still missing (along with frames)

***note: The screenshot shows a 3x3 area where all squares were filled with framed maps. 6 maps have gone missing and cannot be retrieved. They are nowhere to be found.