Drag and drop does not work on macOS

Run the example at https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_draganddrop (for logging of the events, replace the html there with the one from the attachment) in either simplebrowser or quicknanobrowser

Dragging and dropping does not work in either of the applications. We can see the dragStart event in the console, but none of the others (like dragEnd, acceptDrop etc).