Checkbox changes state on device Rotation

[reverse-unina]

When I perform these sequences of events, the checkbox:

Sequence 1: IF no user extension added

1. Click on Target Extensions
2. Enter Extension
3. Click OK
4. Orientation change

Sequence 2: IF exist at least an extension created by user

1. select a target extension defined by user
2. Orientation change

Sequence 3:

1. select a target directory
2. Orientation change