QComboBox Item list does not work on Split view when QComboBox has been

Preconditions:
Application includes QGraphicsView with embedded QComboBox.
Application is on landscape or portrait mode.

Test steps:
1. Tap the split view text input area.
--> split view is opened.
2. Tap the small arrow icon on QComboBox

Expected result:
Item list is opened to foreground.

Actual result:
Item list is sometimes opened

• behind the split view virtual keyboard --> not possible to select items.
• foreground but then the split view virtual keyboard is closed. When item is selected from the list, the split view is not opened again.