QGraphicsWebView without scrollbar: incorrect view position after changing virtual keyboard mode

Preconditions:
QGraphicsWebView includes url input box and some HTML content. View is on portrait orientation.

• tested with pvkb-addressbook test application:

• select 'GWeb' button and e.g. 'Drag-drop edit'
• set scoll bars 'off' from 'SB' button

Test steps:
1. Tap e.g. 'Tigress' text input field on test application.
--> split view is opened on portrait orientation with qwerty virtual keyboard (error can also reproduced with alphanumeric virtual keyboard).
2. Change the virtual keyboard mode from qwerty to alphanumeric.
3. Close the split view.

Expected result:
View is positioned as it was before opening the split view.

Actual result:
View has 'dropped' so that it's upper part is on the middle of the screen.
Note: locking/unlocking the keys does not refresh the view.