[REG 5.1->5.4] TextEdit does not apply underline properly when mixing asian and latin glyphs

The following TextEdit will render the underline through the text instead of under it (note that there is an asian character followed by some latin characters):

TextEdit {
    text: "\u6277 abc"
    font.family: "Noto Sans CJK SC"
    font.underline: true
}

Tested with Noto Sans as well as Droid Sans fallback. The problem doesn't occur with typefaces lacking east asian characters. The problem doesn't occur with TextInput, either.