Unicode symbols not being displayed in widgets
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I have a string containing the Unicode character  (U+FFFC or \ufffc).
If I call QFontMetrics::InFont( QChar ) on the character it returns true.
If I call QFontMetrics::horizontalAdvance( QChar ) on the character it returns 24.
But nothing is displayed for this character in my QTableView for any of the major fonts. Not even a space. It appears to be 0 width. Other characters display fine.
Is this a known bug?
This is a problem with Qt 5.15.2 on Windows 10 and Qt 5.15.2 on macOS 12.01.
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Here you can see the same text containing QChar( 0xFFFC ) characters is displayed differently via QLineEdit (spaces), QTextView (0 width) and qDebug (? chars).
I have added this to the Qt bug database as:
https://bugreports.qt.io/browse/QTBUG-98645
I have attached example code there.
