I have an ArcGIS Pro project set up to publish a feature layer with custom symbology (feature templates are created for each layer). I can publish the service without issue to both AGOL and ArcGIS Enterprise (hosted on Azure) and the symbology shows up on the portal/agol webmaps.
The issue is that when I build a collector webmap (with editing enabled and set to work offline). I can take the Webmap offline successfully from both AGOL and Enterprise but in Enterprise/Portal the custom point symbology does not show up at all, in fact those point symbols do not show up as editable layers.
I have configured Enterprise to use the offline basemaps from the offline group and given AGOL credentials mapped which all works but the offline custom symbology not working is a show stopper.
Any workarounds or solution would be greatly appreciated.