Append data to Hosted Feature Layer creates duplicate fields (duplicate FID's!!) in ArcGIS online that do not exist in my appended data when viewed in ArcGIS pro or ArcMAP. When I download the shapefile, it also does not show duplicate FID's. If I open the hosted layer in ArcGIS Pro from arcGIS cloud, it does show duplicate fields. How do I stop it from duplicating the counties when I update the data I have joined to them?
Steps taken to reproduce bug:
1. Append .csv data to hosted layer
2. Choose FID = Object ID in append dialogue
3. check to make sure fields match up (they do)
5. Multiple fields created