I have a web map that has a hosted feature layer and a layer from a feature service I've published from my ArcGIS server (10.6.1). When I create an offline areas using the Manage offline areas tool, the hosted layer and the basemap show up as cached, but the feature service layer is just missing.
It seems to create just fine if I download an ad hoc area from Collector or Collector Aurora.
Anyone else have this problem or are aware of a limitation of the pre-defined offline caches?