Attributes are duplicated when performing a split in ArcGIS Online regardless of the set splitPolicy in the layer definition.

Solução Provisória

If the split policy is to be honored, set the field to use the 'Default' policy and clear its attributes before performing the split in ArcGIS Pro.

If BUG-000165218 is encountered, where modifying metadata in ArcGIS Online resets the split policy of fields with specified domains to 'Default', and the intention is to always duplicate the attributes, use the ArcGIS Web Editor instead.

Etapas para Reproduzir