It appears that after the last upgrade on March 14th, we no longer have the ability to click on a location in the map for the zonal instant apps tool. I have looked through all of the settings with the express configuration turned off - multiple times, and there is nothing that I can see where I would have missed a new setting to turn on or off for this option.
Here is my app: Who Are My Representatives? (arcgis.com)
If you search for an address, such as 500 N Mission St, it works just fine. But not if you click on that location in the map.