Context Menu Disappears on Device Rotation

[reverse-unina]

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

Sequence 1:

1. Click on Units
2. enter text "example" in Search View
3. Long Click on item in list
4. Orientation Change

Sequence 2:

1. Make conversion
2. Long click on item in ResultView
3. Orientation Change

Sequence 3: [IF At least a conversion made]

1. Press on Menu Button
2. Click on Show History
3. Long click on item in History
4. Orientation Change