We are running into a bug when exporting a hosted feature service from AGOL. Our hosted feature service has several related tables and one of those related tables has a Subtype set on one of the fields in the table. The bug is that the subtype is not in the file geodatabase resulting from the export. We see the behavior whether using the 'Export' button on the Item Details page or using the 'Create Replica' REST endpoint on the hosted feature service.
Anyone else see this behavior when exporting?