In the configuration window of Geoprocessing widget, in the "Options" section there are several possibilities of handling of the result raster. It is possible to display the result in the map or download the raster. However, when both of the options are checked (which is technically possible, there is checkbox instead of radio-button), the result is only displayed and can't be downloaded.
It would be very useful if the result could be shown in the map and downloaded at the same time, in one run of the geoprocessing task.
The only current possible workaround is to add the widget in the app twice, first with the option "View result with a map service" and second with the option "Allow to export results" chosen, and run the task twice, which is quite time-consuming.
