Maximized QML application: background application visible after orientation switch on split view

Preconditions:

QML application includes some TextEdit elements. Tested with 'QMLTextEditTest' test application.
Maximized view is on portrait or landscape orientation.

Test steps:
1. Tap some TextEdit element, e.g. 'First Input' on the test application.
--> Split view is opened.
2. Change the orientation from portrait to landscape (or vice versa).
3. Close the split view.

Expected result:
View is correctly visible, as it was before opening the split view.

Actual result:
Background application is displayed on split view virtual keyboard area.