[MAC] GIU toogle button background color issue '19b

I have a problem about changing the 'BackgroundColor' of a toobleButton.

I can change the value, but that has no effect on the monitor.

I'm using Matlab 2019b.

With win10 and Linux it works perfectly. On MAC it does nothing.

(I can change the color of the text on a toggleButton.)

I tried:

hObject.backgroundColor = [1 0 0]

set(hObject, 'BackgroundColor', [1 0 0])

drawnow