Text on a disabled button does not change color on MacOs in light mode

Hello,

There seems to be a slight issue with the disabled button on MacOs. When a button widget is assigned the disabled property, it only changes the appearance of the button and not the text. This can be seen in the attached images. 

This can of course be solved by using a simple style sheet, however I do not think this should be necessary. Attached are images of what a disabled button currently looks like on MacOs as well as what I believe it should look like.  

Important to note, this is only a problem when is light mode, the button appears as expected when in dark mode. 

Attached is a very simple example which contains the issue.