Small drawing problems on status pane area while split view is open

Preconditions:

Application includes QWidget with some text input widgets. View is on portrait orientation.
Tested with Qt Example applications: star delegate (examples/itemviews/stardelegate), line edits (examples/widgets/lineedits).

Test steps:
1. Tap some editable field

Expected result:
Status pane is correctly drawn while split view is open.

Actual result:
Small, narrow areas on both sides of status pane not correctly drawn, i.e. the application area is visible.
Note: error is not common for all Qt applications.