Multi drag n drop is not managed properly with a Windows mime type 'FileContents'

There is an issue while for instance we try to drag n drop several mail attachments from outlook.
I ask the QMimeData object to give me the data related to the mime type: application/x-qt-windows-mime;value="FileContents", and all I retrieve from this is the content of one file of the initial selection.
The problem is located in the method static QByteArray getData(int cf, IDataObject *pDataObj) (line 156) in the file qmime_win.cpp.

The code looks like that:

//Try reading IStream data
formatetc.tymed = TYMED_ISTREAM;
if (pDataObj->GetData(&formatetc, &s) == S_OK) {
   char szBuffer[4096];
   ULONG actualRead = 0;

GetData is done only on one index of the object formatect, designed by the attribute lindex of the Windows structure FORMATETC:

typedef struct tagFORMATETC
    {
    CLIPFORMAT cfFormat;
    DVTARGETDEVICE *ptd;
    DWORD dwAspect;
    LONG lindex;
    DWORD tymed;
    } 	FORMATETC;

You do not iterate on the index so the only data you read is the data of the first element dropped.
Would it be possible to fix it please?