Dark mode with Mojave does not paints few controls

Dark mode with Macintosh style does not paints QLineEdit/QComboBox/QScrollBars etc correct. Background does not chagnes to Black and remains white.

Attached is the screen shot.
This can be reproduced :
run Qt example: qtbase/examples/widgets/widgets/styles

• select 'macintosh' style
• open macOS 'system Preferences' - 'General' tab
• select 'Dark' appearance.
• problem: text in QLineEdit is no visible, the QLineEdit background should be
  black.