We are created a group layer in the ArcGIS Pro & shared as a grouplayer to the ArcGIS Portal - 10.8.1 (federated server).
All the group items are displaying the "Labels " in the group except one group item not displaying the labels in the web maps. But before publishing "labels " are displaying in the ArcGIS pro perfectly. All the feature classes are from same dataset & all are polygons.
We have checked the following activities to find out the solution.
Product: Portal for ArcGIS
Version: 10.8.1
OS Name: Windows Server
Find the attached screenshots for your reference