Dropping file on file-upload control does not dismiss file picker 1. click on a <input type="file"> control 2. drop a file onto the same control 3. expect the file-picker dialog to auto-dismiss, instead it sticks around. I did not try actually choosing a file with this strangely-still around file picker. No clue what could happen. Heck, if some event listener removed the input type=file on a change event the file picker could even cause a crash if written wrong (that's a wild assumption, not a fact).
I would actually expect dropping on the control to have no effect while a sheet is displayed - as those are window-modal.