QComboBox doesn't change the item by using mouse wheel

I used Qt4 in my application for a long time. In Qt4 QComboBox has a great feature that facilitates work with it:
when my mouse pointer enters some combobox (become focused on it) I can change combobox item by using mouse wheel.
After switching to Qt5.6 I noticed that this feature is broken down on MAC OS.
And when I try to change combobox item by mouse wheel this has no effect.
It can be easily reproduced on any Qt example on window with QComboBox.
NOTE: On Linux and Windows this feature is still working .