Wrong sizeHint for layout containing a word-wrapped label

When adding a word-wrapped label in a layout, the sizeHint is wrong. In attachment a minimal example is provided. Next to that a screenshot is provided of how it looks on Qt 6.0.1 in combination with macOS 10.15.

The way a label is word wrapped depends on the font, fontSize, ... So to reproduce this issue on another platform it might be necessary to make the text of the label a bit longer or shorter. It's easiest to reproduce if it's just too long to fit on 2 lines (so only a few characters have to go on a 3rd line)

I debugged the problem a bit and it looks strange to me that inside QLayout::totalSizeHint(), the heightForWidth is asked for a width that includes the margins of the parentWidget while the layout can not use these margins to place the label.

Changing

 s.setHeight(heightForWidth(s.width() + side));

into

 s.setHeight(heightForWidth(s.width()));

seems to fix the problem for me.