QMediaMetaData does not know FLAC file on Ubuntu 22.04

In the code attached, Qt does not recognize that the audio file is a FLAC file. Here is the output of the code:

QMediaMetaData::Duration QVariant(qlonglong, 0)
QMediaMetaData::FileFormat QVariant(QMediaFormat::FileFormat, QMediaFormat::UnspecifiedFormat)
QMediaMetaData::Url QVariant(QUrl, QUrl("qrc:/test.flac"))

Note that file, mediainfo, etc. recognizes the correct file format.

I use Qt 6.4.2 installed with aqtinstall.

REOPEN: the problem is confirmed by another user that has installed Qt 6.4.3 from the official installer on a fresh Ubuntu 22.04.

Step to reproduce:

1. use Ubuntu 22.04 up to date
2. download the Qt Online installer
3. install it with default option (ensure QTMultimedia is installed)
4. Try to play the example (QMediaMetaData_flac)
5. You should get the same output as reported above.