QtWebEngine: Changing font through javascript call does not work for fonts that have "bold" or "regular" after the name

When trying to set a font that has "bold" or "regular" at the end of the name, default font is set for the web page. The call to set the font is:
document.body.style.fontFamily = 'font name'

Using the unsupported --single-process flag actually fixes this issue, but is not a feasible workaround. This problem is not specific to any special fonts, even the most basic fonts that come installed with Windows do not work.

Steps to reproduce:

• Run attached sample
• Change font to any font that ends with word "bold" from the QFontComboBox
• EXPECTED: Font is properly shown
• ACTUAL: Default font is shown