I have an issue with layer's attribute table in ArcGIS Online. My Web Mapping Application is based on ArcGIS Server's (10.3) service (Web Map). After creating the web mapping application using ArcGIS Online's App Builder I tried to calculate one of the field's Statistics and noticed that the Number of values is not matching to the total number of features in that layer.
The screenshot attached explaining everything I suppose.
Any idea why on this will be highly appreciated.