QWidget with QWebView: top part of QWidget is not visible after opening & closing Split view

Preconditions:

Application includes QWidget with QWebView. QWebView includes QLineEdit and some HTML content. Tested with pvkb-addressbook test application (Web tab content).
Application is on portrait mode.

Test steps:
1. Tap some editable text area.
--> split view is opened.
2. Close the split view.

Expected result:
Application screen is displayed as it was before opening the split view.

Actual result:
Top part of the application screen is not visible. In the used test application it includes QLineEdit.
If split view is opened&closed again, the application screen is correctly displayed. But the error can be reproduced again when split view is opened next.