In a Portal for ArcGIS Web App we randomly see the pop up for a map service not displaying as it is configured within the web map. We are in Portal for ArcGIS v1.2 and Web App Builder Developers Edition v1.3 Please see attached for a screen shot of the configured pop up and the incorrect display of the pop up. This is random and not specific to a map service or web map, it has occurred with different map services and different web maps. I'm guessing it is a bug and hoping other users have seen this occurrence.