With recent release of Enterprise and ArcGIS Online the Search, Map Layers, and Table Widgets are now compatible with Subtype Group Layers. I suggest that the Print Widget also be compatible with Subtype Group Layers. Currently if I have a map that contains these Subtype Group Layers the print fails. Many of my maps are information that contain Utility Networks that best load with Subtype Group Layers. My end users sometimes will put up an area that shows where the utilities and then Print it via the Print Widget to be used as an exhibit attachment to a document or sending information to others. At least that is what they did in WebApp Builder.
By not having the Print widget compatible with Group Subtypes, then these types of maps I can't utilize the Print widget making my new Experience Builder Applications with less options than my old WebAppBuilder Applications.