Dialog Disappears on Device Rotation

[reverse-unina]

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

Sequence 1:

1. Click on Sort Image
2. Orientation Change

Sequence 2:

1. Click on Manage Data
2. Click on Import CSV from SD card
3. Click on Help
4. Orientation Change

Sequence 3:

1. Click on Manage Image
2. Orientation Change

Sequence 4:

1. Press Menu Button
2. Click on Stats
3. Orientation Change

Sequence 5:

1. Long click on item in list
2. Click on Delete Book
3. Orientation Change

Sequence 6:

1. Click on Manage Image
2. Click on Export CSV to SD Card
3. Orientation Change

Sequence 7:

1. Click on Manage Image
2. Click on Reset all Cover Images
3. Orientation Change

Sequence 8:

1. Click on Manage Image
2. Click on Clear Database
3. Orientation Change

Sequence 9:

1. Click on Manage Image
2. Click on Delete Internal Backup
3. Orientation Change

Sequence 10:

1. Click on Search Image
2. Enter "example"
3. Click on "Search" button
4. Click on an item in list
5. Press on Menu Button
6. Click on "Scanning Tips"
7. Orientation Change

Sequence 11:

1. Click on Manage Data
2. Import CSV File
3. Click on Help
4. Orientation Change

Sequence 12:

1. Click on Manage Data
2. Click on Export CSV File
3. Orientation Change