QMediaPlayer metaDataChanged(QString,QVariant) signal not emitted on OSX

The title says it all.
Attached, a modified version of the VideoWidget example which shows the issue.
On Linux and Windows, the metaDataChanged signal is emitted, while on OSX it isn't.

This signal is fundamental to retrieve information about the video it's going to play. For example a UI might want to display the codecs used or the video resolution.

Tested with some MOV and MP4 videos. Couldn't test anything else cause there is no AVI/MKV support on OSX ??