I uploaded an xlsx file of restaurants and their respective addresses to my AGOL account. I accept the geocoding processing and use our own (not ESRIs global) locating service. It tells me that 214 address are good, but two are not. Good. That's what I expected. I then accept the suggestion to review the addresses, and it takes me to a map view. So far so good.
However, when I attempt to alter the two non-located addresses, nothing really happens. Following the help page , I enter the corrected address in the table, and hit enter. It still gives me the same world-wide suggestions it originally did. On top of that, the 214 points that allegedly geocoded are no where to be seen on the map. I can 'zoom to the layer' and the extent is correct, but no points appear. But.... Back at the item details page, I can click the Visualization button, and they magically appear.
I've probably geocoded millions of address records using ArcGIS Desktop: 15 years or so in 9-1-1 will do that to you. This xlxs worksheet geocodes just fine in ArcGIS Pro 2.3 with the same locator: so what's the trick in AGOL?