QFileDialog::DontConfirmOverwrite option does not work when OS X App is sandboxed

A "save as" QFileDialog with option QFileDialog::DontConfirmOverwrite set to true displays the overwrite query when App is sandboxed.
If the App is not sandboxed it work like expected.

QFileDialog fd( this, tr("Save as"), file_name, "(*.txt)" );
fd.setAcceptMode( QFileDialog::AcceptSave );
fd.setFileMode( QFileDialog::AnyFile );
fd.setViewMode( QFileDialog::List );
fd.setOption( QFileDialog::DontConfirmOverwrite, true );
int rc = fd.exec();