QGraphicsWebView without scrollbar: view is not correctly updated after split view closed

Preconditions:

QGraphicsWidget includes url input box and some HTML content. View is on portrait mode.

• tested with pvkb-addressbook test application:

• select 'GWeb' and set scrollbar 'off' (from 'SB' button)
• select 'mike's test --> view includes many QLineEdits

Test steps:
1. Tap QLineEdit on bottom of the screen (e.g. 'Field 7' on test application)
--> split view is opened
2. Close the split view

Expected result:
Application view is drawn as it was before split view was opened.

Actual result:
Split view virtual keyboard area is drawn as black. View has moved upwards i.e. 'Field 8', 'Field 7' etc. can be seen on middle of the screen.