Dialogs disappear on device rotation

[reverse-unina]

When I perform these sequences of events, the dialog on screen disappears:

Sequence 1:
[A game started]
1.  Click on New Game
2.  Orientation Change

Sequence 2:
[Old version installed]
1.  Click on Load Game
2.  Click on item in list
3.  Orientation Change

Sequence 3:
[1. A game is saved
2. World map]

1. Click on Save Image
2. Click on Item in list
3. Orientation Change