Dialog disappears on device rotation

[reverse-unina]

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

Sequence 1

1. Click on "..."
2. Click on Set Wallpaper
3. Orientation Change

Sequence 2

1. Click on "..."
2. Click on Manage Fractals
3. Click on "..."
4. Click on Delete all Files
5. Orientation Change

Sequence 3

1. Click on "..."
2. Click on Manage Fractals
3. Click on delete icon
4. Orientation Change

[forman]

On which device?

[reverse-unina]

I tested it on several configurations of virtual and real Android devices for research purposes. I am developing an automatic testing technique to find this kind of failures. So I would be extremely grateful if you send me a feedback about this behaviour.

Thanks,
Reverse-VinRiccio