Dialogs Disappear on Device Rotation

[reverse-unina]

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

Sequence 1:

1. Click on SingleWord Diagrams
2. Orientation Change

Sequence 2:

1. Click on Random Words
2. Orientation Change

Sequence 3:

1. Click on Contained Words
2. Orientation Change

Sequence 4:

1. Click on Choose WordList
2. Click on Choose File
3. Click on File
4. Orientation Change

Sequence 5:

1. Click on Choose WordList
2. Orientation Change

Sequence 6:

1. Click on Choose WordList
2. Click on Choose File
3. Select file
4. Click on Yes
5. Orientation Change