I have setup a Portal server, then published several shapefiles to the Portal as hosted layers and created a map app.
The problem is that when the user opens the map app everyday, the hosted layers cannot be loaded to the map and user has to open the map service Url e.g. https://xxx.yyy.com:6443/arcgis/rest/services/Hosted/Market/FeatureServer in browser. Then the layers can be loaded to the map app. Anyone has ideas about the problem?