QFontInfo weight()/style() don't match with styleName()

If I create a QFont and set a styleName(), the associated QFontInfo doesn't show the right values for weight()/style() and similar.

Here's an example, the font used is "Noto Sans"

qDebug() << font_info.weight() << font_info.style() << font_info.styleName() << font_info.bold() << font_info.italic();
// output with "Bold Italic"
// 50 QFont::StyleNormal "Bold Italic" false false
// output with "Regular"
// 50 QFont::StyleNormal "Regular" false false

The font is rendered with bold/italic correctly but there is no way of telling from QFontInfo.

Even using QRawFont gives the same results.