When selecting All from the search widget in ArcGIS Online web applications, list of suggestions is only able to appear when all geocode services have been created using address locators created at version 10.3 with suggestions enabled.
Last Published: January 18, 2016ArcGIS Online
Bug ID Number
April 28, 2015
June 11, 2020
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
Locators must have the suggest capability in order for the search box to show suggest results.
Create all locators added to ArcGIS Online at version 10.3 of ArcMap, with the suggest capability enabled for the address locator and geocode service.