We are getting some latency issue with Portal for ArcGIS environment with federated ArcGIS server.
After publishing the Map Services, while getting the layer display over the map control is very slow some time it is not showing.
I try to get the debug logs one of the debug message is
Exception while computing compute certain flags in self resource (ex: supportsSceneServices). Likely cause is a badly configured system default account (system_publisher)
The system is validating well but not fully supporting