Drag animation starts from topleft corner of app when using QDrag::exec with mulitple files

When dragging multiple files using QDrag::exec: Animation of dragging image starts from application top-left corner and quicky moves to correct position near cursor.

Expected behavior: Animation should start near cursor position.

When using builtin solution ( QTreeView ) it does work as expected most of the time, but sometimes it does the same thing.

uploaded: `treedrag_bug.tgz` with minimal reproducible example

Changes came from this issue which solved not working dnd for multiple files.
https://bugreports.qt.io/browse/QTBUG-71939