http://doc.qt.io/qt-5/qt.html#WidgetAttribute-enum has a table where the Description column has hidden text; you must highlight the text and drag the mouse to the right to see it, or alternatively, scroll all the way down to the bottom of the table (it's quite large) and use the scroll bar down there.

I'm guessing that the cause for this is Qt::WA_NoBackground which has a larger value than all of the other rows. Since WA_OpaquePaintEvent can't really be split into two for word wrapping, nor the text size reduced, perhaps the width of the Description column should be reduced to remove the need for the scrollbar.